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{{Article issues|globalize=April 2009|restructure=January 2008}}
{{Mergefrom|Fountain drink|date=January 2008}}
A '''soft drink''' is a drink that does not contain [[ethanol|alcohol]] . Soft drinks are often [[carbonated]] and commonly consumed while [[cold]]. The most common soft drinks are [[cola]]s, [[flavored water]], [[sparkling water]], [[iced tea]], [[sweet tea]], [[lemonade]], [[squash (drink)|squash]] and [[fruit punch]].

The term Sam is a nub
is employed in opposition to "hard", i.e. alcoholic drinks. Generally it is also implied that the drink does not contain [[milk]] or other [[dairy]] products. [[Hot chocolate]], hot [[tea]], [[coffee]], [[tap water]], [[juice]] and [[milkshake]]s also do not fall into this classification.

Many carbonated soft drinks are optionally available in versions sweetened with [[sugar]]s or with [[Sugar substitute|non-caloric sweetener]]s.
[[Image:Soft drink shelf.JPG|thumb|250px|Sundry soft drinks on [[supermarket]] shelves.]]

==Regional names for soft drinks==
{{Main|Names for soft drinks}}
The terms used for soft drinks vary widely both by country and regionally within some countries<ref>{{cite web|url=http://popvssoda.com:2998/countystats/total-county.html |title=Generic Names for Soft Drinks by Country |publisher=popvssoda.com |author=Matthew T. Campbell |date=2003-04-01 |accessdate=2009-06-15}}</ref>:

{| class="wikitable" style="text-align:left"
|-
!Country!!Terms
|-
|[[Australia]]||soft drinks, fizzy drinks
|-
|Some parts of [[Africa]]||minerals
|-
|[[Canada]]||pop, coke, cola, soft drink
|-
|[[India]]||cold drink
|-
|[[Ireland]] || Minerals, soft drinks, fizzy drinks.
|-
|[[Israel]]||fizzy bubbly
|-
|[[South Africa]] ||cooldrink, colddrink, fizzy drink, soft drink (formal)
|-
|[[South Korea]]||cider
|-
|[[United States]] ||soda, soda pop, pop, coke, cola, tonic, soft drink
|-
|[[United Kingdom]] ||soft drinks, pop, fizzy drinks
|}

==History==
{{Refimprovesect|date=June 2008}}
Soft drinks trace their history back to the mineral waters found in natural springs. Ancient societies believed that bathing in natural springs and/or drinking mineral waters could cure many diseases. Early scientists who studied mineral waters included [[Geber]], [[Al-Kindi|Alkindus]], [[Muhammad ibn Zakarīya Rāzi|Rhazes]], [[Paracelsus]], [[Robert Boyle]], [[Friedrich Hoffmann]], [[Antoine Laurent Lavoisier]], [[Hermann Boerhaave]], William Brownrigg, Gabriel F. Venel, [[Joseph Black]], and David Macbride.

The earliest soft drinks were [[sherbet]]s developed by [[Alchemy and chemistry in Islam|Arabic chemists]] and originally served in the [[Islamic Golden Age|medieval Near East]]. These were juiced soft drinks made of crushed fruit, herbs, or flowers.<ref>Juliette Rossant (2005), [http://www.saudiaramcoworld.com/issue/200505/the.world.s.first.soft.drink.htm The World's First Soft Drink], ''[[Saudi Aramco World]]'', September/October 2005, pp. 36-9</ref>
From around 1265, a popular drink known as [[Dandelion & Burdock]] appeared in [[England]], made from fermented dandelion (Taraxacum officinale) and burdock (Arctium lappa) roots, and is naturally carbonated. The drink (similar to [[Sarspirilla]]) is still available today but made with flavorings and carbonated water since the [[Safrole]] in the original recipe was found to be [[carcinogenic]].<ref>Chris Milliken (2007). British Soft Drinks Since 1960. University of Cambridge</ref>

The first marketed soft drinks (non-carbonated) in the [[Western world]] appeared in the 17th century. They were made from water and lemon juice sweetened with honey. In 1676, the ''Compagnie des Limonadiers'' of Paris was granted a monopoly for the sale of lemonade soft drinks. Vendors carried tanks of lemonade on their backs and dispensed cups of the soft drink to thirsty Parisians.

===Carbonated drinks===
In late 18th Century, scientists made important progress in replicating naturally carbonated [[mineral water]]s. In 1767 [[England|Englishman]] [[Joseph Priestley]] first discovered a method of infusing water with [[carbon dioxide]] to make [[Carbonated water]]<ref>{{cite web|author=Mary Bellis |url=http://inventors.about.com/library/inventors/blJosephPriestley.htm |title=Joseph Priestley - Soda Water - Joseph Priestly |publisher=Inventors.about.com |date=2009-03-06 |accessdate=2009-06-08}}</ref> when he suspended a bowl of distilled water above a beer vat at a local brewery in [[Leeds]], [[England]]. His invention of [[Carbonated water]], (also known as [[soda water]]), is the major and defining component of most soft drinks. Priestley found water thus treated had a pleasant taste and he offered it to friends as a refreshing drink. In 1772 Priestley published a paper entitled ''Impregnating Water with Fixed Air'' in which he describes dripping ''oil of vitriol'' (or [[sulfuric acid]] as it is now called) onto [[chalk]] to produce carbon dioxide gas, and encouraging the gas to dissolve into an agitated bowl of water.<ref>http://www.truetex.com/priestley-1772-impregnating_water_with_fixed_air.pdf</ref>

Another Englishman, John Mervin Nooth, improved Priestley's design and sold his apparatus for commercial use in pharmacies. Swedish chemist [[Torbern Bergman]] invented a generating apparatus that made carbonated water from chalk by the use of sulfuric acid. Bergman's apparatus allowed imitation mineral water to be produced in large amounts. Swedish chemist [[Jöns Jacob Berzelius]] started to add flavors (spices, juices and wine) to carbonated water in the late 18th century.

===Soda fountain pioneers===
{{Main|Soda fountain}}
Artificial mineral waters, usually called "soda water," and the [[soda fountain]] made the biggest splash in the United States. Beginning in 1806, Yale chemistry professor [[Benjamin Silliman]] sold soda waters in New Haven, Connecticut. He used a Nooth apparatus to produce his waters. Businessmen in Philadelphia and New York City also began selling soda water in the early 1800s. In the 1830s, [[John Matthews (soda water manufacturer)|John Matthews]] of New York City and John Lippincott of Philadelphia began manufacturing soda fountains. Both men were successful and built large factories for fabricating fountains.

===Soda fountains vs. bottled sodas===
The drinking of either natural or artificial mineral water was considered a healthy practice. The American pharmacists selling mineral waters began to add herbs and chemicals to unflavored mineral water. They used birch bark (see [[birch beer]]), [[dandelion]], [[sarsaparilla]], fruit extracts, and other substances. Flavorings were also added to improve the taste. Pharmacies with soda fountains became a popular part of American culture. Many Americans frequented the soda fountain on a daily basis. Due to problems in the U.S. glass industry, bottled drinks were a small portion of the market in the 19th century. Most soft drinks were dispensed and consumed at a soda fountain, usually in a drugstore or ice cream parlor. In the early 20th century, sales of bottled soda increased exponentially. In the second half of the 20th century, canned soft drinks became an important share of the market.

===Soft drink bottling industry===
Over 1,500 U.S. patents were filed for either a cork, cap, or lid for the carbonated drink bottle tops during the early days of the bottling industry. Carbonated drink bottles are under a lot of pressure from the gas. Inventors were trying to find the best way to prevent the carbon dioxide or bubbles from escaping. In 1892, the "Crown Cork Bottle Seal" was patented by William Painter, a Baltimore machine shop operator. It was the first very successful method of keeping the bubbles in the bottle.

====Automatic production of glass bottles====
In 1899, the first patent was issued for a glass-blowing machine for the automatic production of glass bottles. Earlier glass bottles had all been hand-blown. Four years later, the new bottle-blowing machine was in operation. It was first operated by the inventor, Michael Owens, an employee of Libby Glass Company. Within a few years, glass bottle production increased from 1,400 bottles a day to about 58,000 bottles a day.

====Home-Paks and vending machines====
During the 1920s, the first "Home-Paks" were invented. "Home-Paks" are the familiar six-pack cartons made from cardboard. Automatic vending machines also began to appear in the 1920s.

==Production==
===Soft drink production===
Soft drinks are made either by mixing dry ingredients and/or fresh ingredients (eg lemons, oranges, ...) with water. Production of soft drinks can be done at factories, or at home.

Soft drinks can be made at home by mixing either a [[syrup]] with carbonated water or by mixing dry ingredients with carbonated water. Carbonated water is made using a [[home carbonation system]]. Syrups are commercially sold by companies such as [[Soda-Club]].

===Soft drink packaging===
{{Unreferenced section|date=December 2008}}
[[Image:Coke 003.jpg|thumb|250px|U.S. containers in 2008. Various sizes from 8-67.6 {{nowrap|[[United States customary units|US fl&thinsp;oz]]}} (237 ml -2 l) shown in can, glass and plastic bottles]]
In the United States, soft drinks are sold in 3, [[two-liter bottle|2]], 1.5, 1 litre, 500 ml, 8, 12, 20 and 24 U.S. fluid ounce plastic bottles, 12 U.S. fluid ounce [[Beverage can|can]]s, and short eight-ounce cans. Some Coca-Cola products can be purchased in 8 and 12 U.S. fluid ounce glass bottles. [[Jones Soda]] and Orange Crush are sold in 16 U.S. fluid ounce (1 U.S. pint) glass bottles. Cans are packaged in a variety of quantities such as [[six pack]]s, 12 packs and cases of 24, 36 and 360. With the advent of [[energy drinks]] sold in eight-ounce cans in the US, some soft drinks are now sold in similarly sized cans. It is also common for carbonated soft drinks to be served as [[fountain drink]]s in which carbonation is added to a concentrate immediately prior to serving.

In [[Europe]] soft drinks are typically sold in 2, 1.5, 1 litre, 330 ml plastic or 500 ml glass bottles, aluminium cans are traditionally sized in 330 ml, although 250 ml slim cans have become popular since the introduction of canned [[energy drink]]s and 355 ml variants of the slim cans have been introduced by [[Red Bull]] more recently. Cans and bottles often come in packs of six or four. Several countries have standard [[recycling|recyclable]] packaging with a [[container-deposit legislation|container deposit]] typically ranging from [[euro|€]] 0.15 to 0.25: bottles are smelted, or cleaned and refilled; cans are crushed and sold as scrap aluminum.

In [[Australia]], soft drinks are usually sold in 375 ml cans or glass or plastic bottles. Bottles are usually 390 ml, 600 ml, 1.2 or 2 litre. However, 1.5 litre bottles have more recently been used by the [[The Coca-Cola Company|Coca-Cola Company]].

In Canada, soft drinks are sold in cans of 236 ml, 355 ml, 473 ml, and bottles of 591 ml, 710 ml, 1 l, 1.89 l, and 2 l. The odd sizes are due to being the [[Metric system|metric]] near-equivalents to 8, 12, 16, 20, 24 and 64 U.S. fluid ounces. This allows bottlers to use the same-sized containers as in the U.S. market. This is an example of a [[Metrication in Canada#Common usage today|wider phenomenon]] in North America. Brands of more international soft drinks such as [[Fanta]] and [[Red Bull]] are more likely to come in round-figure capacities.

In India, soft drinks are available in 200 ml and 300 ml glass bottles, 250 ml and 330 ml cans, and 600 ml, 1.25 l, 1.5 l and 2 l plastic bottles.

==Ice cream sodas/floats==
{{Main|Ice cream soda}}
The [[ice cream soda]], also called float, is a drink that consists of one or more scoops of ice cream in either a soft drink or a mixture of flavored syrup and carbonated water. The most common of these is the [[ice cream soda#root beer float|root beer float]]. In the Midwestern United States, it is usually called an "ice cream float," but may be called an "[[ice cream soda]]," or soda for short, as they were made at the once-ubiquitous [[soda fountain]]s. In Australia and New Zealand, it is known as a "spider." In Scotland (mainly the west coast) it is usually referred to as a "float," for example, a "coke float" (as elsewhere, "coke" is often used generically to refer to any cola in Scotland, while "soda" in Scotland is usually taken to mean soda water). In [[Belfast]], [[Northern Ireland]], there is a regional variation: cola (regardless of brand) and vanilla ice cream are called a "coke afloat."

In the United States, some ice cream sodas have specific names such as "black cow," "brown cow," "[[ice cream soda#purple cow|purple cow]]" (vanilla ice cream in purple grape soda), and "[[ice cream soda#Boston cooler|Boston cooler]]" (vanilla ice cream in [[Vernor's]] ginger ale).

== Health effects ==

The consumption of sugar-sweetened soft drinks is associated with [[obesity]]<ref name="Malik, Schulze, & Hu (2006)">{{citation
|last1=Malik |first1=V.S. |last2=Schulze |first2=M.B. |last3=Hu |first3=F.B.
|year=2006
|title=Intake of sugar-sweetened beverages and weight gain: a systematic review
|journal=American Journal of Clinical Nutrition |volume=84 |issue=2 |pages 274-28
|url=http://www.ajcn.org/cgi/reprint/84/2/274
}}</ref><ref name="Vartanian, Schwartz, & Brownell (2007)">{{citation
|last1=Vartanian |first1=L.R. |last2=Schwartz |first2=M.B. |last3=Brownell |first3=K.D.
|year=2007
|title=Effects of soft drink consumption on nutrition and health: a systematic review and meta-analysis
|journal=American Journal of Public Health |volume=97 |issue=4 |pages=667-675
|url=http://www.ajph.org/cgi/reprint/97/4/667.pdf
}}</ref> and is also associated with [[Diabetes mellitus type 2|type 2 diabetes]], [[dental cavities]], and low nutrient levels.<ref name="Vartanian, Schwartz, & Brownell (2007)"/> Experimental studies tend to support a causal role for sugar-sweetened soft drinks in these ailments,<ref name="Malik, Schulze, & Hu (2006)"/><ref name="Vartanian, Schwartz, & Brownell (2007)"/> but the scarcity of experimental studies leads some researchers to conclude that the evidence for causation is inconclusive<ref name="Gibson (2008)">{{citation
|first1=Sigrid |last1=Gibson
|year=2008
|title=Sugar-sweetened soft drinks and obesity: a systematic review of the evidence from observational studies and interventions
|journal=Nutrition Research Reviews |volume=21 |pages=134–147
}}</ref> or open to debate.<ref>{{cite
|last1=Wolff |first1=E. |last2=Dangsinger |first2=M.L.
|year=2008 |title=Soft drinks and weight gain: How strong is the link?
|journal=Medscape Journal of Medicine |volume=10 |issue=8 |pages=189
|url=http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pubmed&pubmedid=18924641
}}</ref>

Many soft drinks contain ingredients that are themselves sources of concern: [[caffeine]] is linked to anxiety and sleep disruption<ref>BBC [http://news.bbc.co.uk/1/hi/health/2638277.stm Fizzy drinks 'affect children's sleep'] 8 January 2003</ref> when consumed in excess, and the health effects of [[high-fructose corn syrup]] and [[Sugar substitutes#Health effects|artificial sweeteners]] remain controversial. [[Sodium benzoate]] has been investigated as a possible cause of DNA damage and [[hyperactivity]]. Other substances have negative health effects, but are present in such small quantities that they are unlikely to pose any substantial health risk. [[Benzene]] belongs to this category: the amount of [[benzene in soft drinks]] is small enough that it is unlikely pose a health risk.<ref name="kiwi">New Zealand Food Safety Authority / Te Pou Oranga kai O Aotearoa [http://www.nzfsa.govt.nz/consumers/food-safety-topics/chemicals-in-food/benzene/index.htm Benzene in flavoured drinks]</ref>

In 1998, the [[Center for Science in the Public Interest]] published a report entitled ''[[Liquid Candy|Liquid Candy: How Soft Drinks are Harming Americans' Health]]''. The report examined statistics relating to the soaring consumption of soft drinks, particularly by children, and the consequent health ramifications including tooth decay, nutritional depletion, obesity, type-2 (formerly known as "adult-onset") diabetes, and heart disease. It also reviewed soft drink marketing and made various recommendations aimed at reducing soft drink consumption.<ref>Michael F Jacobson PhD, ''[http://www.cspinet.org/new/pdf/liquid_candy_final_w_new_supplement.pdf Liquid Candy: How Soft Drinks are Harming Americans' Health]'', ([[CSPI]], Washington DC 1998; 2nd Ed. 2005).</ref>

===Obesity and weight-related diseases ===

From 1977 to 2001, Americans doubled their consumption of sweetened beverages<ref>{{citation
|last1=Nielsen |first1=S. |last2=Popkin |first2=B. |year=2004
|title=Changes in beverage intake between 1977 and 2001.
|journal=American Journal of Preventive Medicine |volume=27 |issue=3 |pages=205-210
}}</ref> - a trend that was paralleled by a doubling of the prevalence of obesity.<ref>{{citation
|last1=Flegal |first1=K.M. |last2=Carroll |first2=M.D. |last3=Ogden |first3=C.L. |last4=Johnson |first4=C.L. |year=2002
|title=Prevalence and trends in overweight among US adults, 1999-2000
|journal=Journal of the American Medical Association |volume=288 |issue=14 |pages=1723-1727
|url=http://www.cnt.org/tsp/pdf/jama%20obesity%20art.pdf
}}</ref> The consumption of sugar-sweetened beverages is associated with weight and obesity, and changes in consumption predict changes in weight.<ref name="Malik, Schulze, & Hu (2006)"/><ref name="Vartanian, Schwartz, & Brownell (2007)"/> One study followed 548 schoolchildren over 19 months and found that changes in soft drink consumption were associated with changes in [[body mass index|body mass index (BMI)]].<ref>{{citation
|last1=Ludwig |first1=D |last2=Peterson |first2=K. |last3=Gortmaker |first3=S |year=2001
|titile=Relation between consumption of sugar-sweetened drinks and childhood obesity: a prospective, observational analysis
|journal=The Lancet |volume=357 |pages=505-508
|url=http://www.commercialalert.org/candp/lancet.pdf
}}</ref> Each soft drink that a child added to his or her daily consumption was accompanied by an increase in BMI of 0.24 kg/m<sup>2</sup>. Similarly, an 8-year study of 50,000 female nurses compared women who went from drinking almost no soft drinks to drinking more than one a day to women who went from drinking more than one soft drink a day to drinking almost no soft drinks.<ref name="Schulze, Manson, Ludwig, et al. (2004)">{{citation
|last1=Schulze |first1=M.B. |last2=Manson |first2=J.A.E. |last3=Ludwig |first3=D.S. |last4=Colditz |first4=G.A. |last5=Stampfer |first5=M.J. |last6=Willet |first6=W.C. |last7=Hu |first7=F.B. |year=2004
|title=Sugar-sweetened beverages, weight gain, and incidence of type 2 diabetes in young and middle aged women.
|journal=Journal of the American Medical Association |volume=292 |issue=8 |pages=927-934
}}</ref> The women who increased their consumption of soft drinks gained 8.0 kg over the course of the study while the women who decreased their consumption gained only 2.8 kg. In each of these studies, the absolute number of soft drinks consumed per day was also positively associated with weight gain.

Still, it is possible that people who lead unhealthy lifestyles consume more soft drinks. If so, then the association between soft drink consumption and weight gain could reflect the consequences of an unhealthy lifestyle rather than the consequences of consuming soft drinks. Experimental evidence is needed to definitively establish the causal role of soft drink consumption. Reviews of the experimental evidence suggest that soft drink consumption does cause weight gain,<ref name="Malik, Schulze, & Hu (2006)"/><ref name="Vartanian, Schwartz, & Brownell (2007)"/> but the effect is often small except for overweight individuals.<ref name="Gibson (2008)"/>

Many of these experiments examined the influence of sugar-sweetened soft drinks on weight gain in chidlren and adolescents. In one experiment, adolescents replaced sugar-sweetened soft drinks in their diet with artificially-sweetened soft drinks that were sent to their homes over 25 weeks.<ref>{{citation
|last1=Ebbeling |first1=C.B. |last2=Feldman |first2=H.A. |last3=Osganian |first3=S.K. |last4=Chomitz |first4=V.R. |last5=Ellenbogen |first5=S.J. |last6=Ludwig |first6=D.S. |year=2006
|title=Effects of decreasing sugar-sweetened beverage consumption on body weight in adolescents: A randomized, controlled pilot study
|journal=Pediatrics |volume=117 |issue=3 |pages=673-680
|url=http://pediatrics.aappublications.org/cgi/content/abstract/117/3/673
}}</ref> Compared with children in a control group, children who received the artificially-sweetened drinks saw a smaller increase in their BMI (by -.14 kg/m<sup>2</sup>), but this effect was only statistically significant among the heaviest children (who saw a benefit of -.75 kg/m<sup>2</sup>). In another study, an educational program encouraged schoolchildren to consume fewer soft drinks.<ref>{{citation
|last1=James |first1=J. |last2=Thomas |first2=P. |last3=Cavan |first3=D. |last4=Kerr |first4=D.
|year=2004 |title=Preventing childhood obesity by reducing consumption of carbonated drinks: cluster randomised controlled trial.
|journal=British Medical Journal |volume=328 |pages=1237
}}</ref> During the school year, the prevalence of obesity decreased among children in the program by 0.2%, compared to a 7.5% increase among children in the control group.

Sugar-sweetened drinks also cause weight gain in adults. In one study, overweight individuals consumed a daily supplement of sucrose-sweetened or artificially-sweetened drinks or foods for a 10 week period.<ref name="Raben, Vasilaras, Moller, & Astrup (2002)">{{citation
|last1=Raben |first1=A. |last2=Vasilaras |first2=T.H. |last3=Moller |first3=A.C. |last4=Astrup |first4=A. |year2002
|title=Sucrose compared with artificial sweeteners: different effects on ad libitum food intake and body weight after 10 weeks of supplementation in overweight subjects.
|journal=American Journal of Clinical Nutrition |volume=76 |pages=721–729.
}}</ref> Most of the supplement was in the form of soft drinks. Individuals in the sucrose group gained 1.6 kg, and individuals in the artificial-sweetener group lost 1.0 kg. A two week study had participants supplement their diet with sugar-sweetened soft drinks, artificially-sweetened soft drinks, or neither.<ref name="Tordoff & Alleva (1990)">{{citation
|last1=Tordoff |first1=M.G. |last2=Alleva |first2=AM. |year=1990
|title=Effect of drinking soda sweetened with aspartame or high-fructose corn syrup on food intake and body weight.
|journal=American Journal of Clinical Nutrition |volume=51 |pages=963–969
}}</ref> Although the participants gained the most weight when consuming the sugar-sweetened drinks, some of the differences were unreliable: the differences between men who consumed sugar-sweetened drinks or no drinks was not statistically significant.

Other research suggests that soft drinks might play a special role in weight gain. One four-week experiment compared a 450 calorie/day supplement of sugar-sweetened soft drinks to a 450 calorie/day supplement of jelly beans.<ref name="DiMeglio & Mattes (2000)">{{citation
|last1=DiMeglio |first1=D.P. |last2=Mattes |first2=R.D. |year=2000
|title=Liquid versus solid carbohydrate: effects on food intake and body weight.
|journal=Int J Obes Relat Metab Disord. |volume=24 |pages=794–800
}}</ref> The jelly bean supplement did not lead to weight gain, but the soft drink supplement did. The likely reason for the difference in weight gain is that people who consumed the jelly beans lowered their caloric intake at subsequent meals while people who consumed soft drinks did not. Thus, the low levels of satiety provided by sugar-sweetened soft drinks may explain their association with obesity. That is, people may who consume calories in sugar-sweetened beverages may fail to adequately reduce their intake of calories from other sources. Indeed, people consume more total calories in meals and on days when they are given sugar-sweetened beverages than when they are given artificially-sweetened beverages<ref name="Tordoff & Alleva (1990)"/><ref>{{citation
|last1=Van Wymelbeke |first=V. |last2=Beridot-Therond |first2=M.E. |last3=de La Gueronniere |first3=V. |last4=Fantino |first4=M.
|year=2004 |title=Influence of repeated consumption of beverages containing sucrose or intense sweeteners on food intake
|journal=Eur J Clin Nutr. |volume=58 |pages=154–161
}}</ref><ref name="Rolls, Kim, & Fedoroff (1990)">{{citation
|last1=Rolls |first1=B.J. |last2=Kim |first2=S. |last3=Fedoroff |first3=I.C. |year=1990
|title=Effects of drinks sweetened with sucrose or aspartame on hunger, thirst and food intake in men
|journal=Physiol Behav. |volume=48 |pages=19-26
}}</ref> or water.<ref name="Rolls, Kim, & Fedoroff (1990)"/>

A study by [[Purdue University]] reported that no-calorie sweeteners were linked to an increase in body weight. The experiment compared rats who were fed [[saccharin]]-sweetened yogurt and [[glucose]]-sweetened yogurt. The saccharin group eventually consumed more calories, gained more weight and more body fat, and did not compensate later by cutting back.<ref name="APA">{{cite web
| url = http://www.sciencedaily.com/releases/2008/02/080210183902.htm
| title = Artificial Sweeteners Linked To Weight Gain
| accessdate = 11 February 2009
| author = [[American Psychological Association]]
| date = 11 February 2008
| work = [[ScienceDaily]]
}}</ref>

The consumption of sugar-sweetened soft drinks is also associated with many weight-related diseases, including diabetes,<ref name="Schulze, Manson, Ludwig, et al. (2004)"/> metabolic syndrome and cardiovascular risk factors,<ref>{{citation
|last1=Yoo |first1=S. |last2=Nicklas |first2=T. |last3=Baranowski |first3=T. |last4=et al.
|title=Comparison of dietary intakes associated with metabolic syndrome risk factors in young adults: the Bogalusa Heart Study
|journal=Am J Clin Nutr |year=2004 |volume=80 |pages=841–848}}</ref> and elevated blood pressure.<ref name="Raben, Vasilaras, Moller, & Astrup (2002)"/>

===Dental decay===
Most soft drinks contain high concentration of simple [[carbohydrates]] - [[glucose]], [[fructose]], [[sucrose]] and other simple sugars. Oral bacteria ferment [[carbohydrates]] and produce acid, which dissolves tooth enamel during the dental decay process; thus, sweetened drinks are likely to increase risk of [[dental caries]]. The risk is greater if the frequency of consumption is high.<ref>Marshall TA, Levy SM, Broffitt B, Warren JJ, Eichenberger-Gilmore JM, Burns TL, Stumbo PJ. "Dental caries and beverage consumption in young children" Pediatrics. 2003 Sep;112(3 Pt 1):e184-91 [http://pediatrics.aappublications.org/cgi/content/full/112/3/e184]</ref>

A large number of soft drinks are [[acid]]ic and some may have a [[pH]] of 3.0 or even lower.<ref>{{cite web | publisher = British Soft Drinks Association | title = Acids | url = http://www.britishsoftdrinks.com/Default.aspx?page=409 | accessdate = 2006-09-12}}</ref>
Drinking acidic drinks over a long period of time and continuous sipping can therefore [[erosion|erode]] the [[tooth enamel]]. Drinking through a straw is often advised by [[Dentistry|dentists]] as the drink is then swallowed from the back of the mouth and does not come into contact with the teeth as much. It has also been suggested that [[Oral hygiene|brushing teeth]] right after drinking soft drinks should be avoided as this can result in additional erosion to the teeth due to the presence of acid.<ref>{{Cite journal |author=M. A. Bassiouny, J. Yang |title=Influence of drinking patterns of carbonated beverages on dental erosion |name=General Dentistry, May-June, vol. 53, no. 3, 2005 |url=http://www.agd.org/library/2005/june/abstracts.asp#abstract_7 |archiveurl=http://web.archive.org/web/20060926020313/http://www.agd.org/library/2005/june/abstracts.asp |archivedate=September 26, 2006}}</ref><ref>{{Cite journal |url=http://www.sciencedaily.com/releases/2005/06/050616060426.htm |title=Saved By A Straw? Sipping Soft Drinks And Other Beverages Reduces Risk Of Decay |name=ScienceDaily |date=June 17, 2005}}</ref>

===Hypokalemia===

There have been a handful of published reports describing individuals with severe [[hypokalemia]] (low potassium levels) related to chronic extreme consumption (4-10 L/day) of colas.<ref>{{cite journal |author=Tsimihodimos V, Kakaidi V, & Elisaf M. |title=Cola-induced hypokalaemia: pathophysiological mechanisms and clinical implications |journal=International Journal of Clinical Practice |volume=63 |issue=6 |pages=900-2 |year=2009 |month=June |doi=10.1111/j.1742-1241.2009.02051.x |url=http://www3.interscience.wiley.com/journal/122384349/abstract}}[http://nerdoc.files.wordpress.com/2009/06/fulltext.pdf free full text]</ref>

===Soft drinks and bone density===
{{COI-section|date=March 2009}}
{{POV-section|date=September 2009}}
There has been a hypothesis that the [[Phosphoric_acid#Processed_food_use|phosphoric acid]] contained in some soft drinks (colas) displaces calcium from the bones, lowering bone density of the skeleton and leading to conditions such as [[osteoporosis]] and very weak bones.<ref>{{cite web|url=http://www.islamonline.net/servlet/Satellite?c=Article_C&cid=1216030527304&pagename=Zone-English-HealthScience%2FHSELayout |title=Five Steps to Kick Your Soft-Drink Addiction |publisher=Islamonline.net |date= |accessdate=2009-06-08}}</ref> However, calcium metabolism studies by leading calcium and bone expert Dr. Robert Heaney determined that the net effect of carbonated soft drinks, (including colas, which use phosphoric acid as the acidulent) on calcium retention was negligible. He concluded that it is likely that cola's prominence in observational studies is due to their prominence in the marketplace, and that the real issue is that people who drink a lot of soft drinks also tend to have an overall diet that is low in calcium.<ref>{{cite journal | journal = [[American Journal of Clinical Nutrition]] | author = Heaney RP, Rafferty K. | title = Carbonated beverages and urinary calcium excretion | volume = 74 | issue = 3 | pages = 343-347 | date = September 2001 | url = http://www.ajcn.org/cgi/content/abstract/74/3/343 }}</ref>{{Citation needed|date=June 2007}}

There is a statistically significant inverse relationship between consumption of carbonated beverages and bone mineral density in young girls, which places them at increased risk of suffering fractures in the future.<ref>J Bone Miner Res. 2003 Sep;18(9):1563-9</ref>

===Nutritional value===
Unless fortified, they also contain little to no [[vitamins]], [[minerals]], [[fiber]], [[protein]], or other [[essential nutrient]]s. Soft drinks may also displace other healthier choices in people's diets, such as [[water]], [[milk]], and [[fruit juice]].<ref>{{cite web|url=http://www.cspinet.org/new/200612061.html |title=Schools Getting Raw Deal from Bottlers ~ Newsroom ~ News from CSPI |publisher=Cspinet.org |date=2006-12-06 |accessdate=2009-06-08}}</ref>

===Sugar content===

While the [[United States Department of Agriculture|USDA]] recommended daily allotment ([[Reference Daily Intake|RDA]]) of added sugars is 10 teaspoons for a 2,000-[[calorie]] diet, many soft drinks contain more than this amount. High caloric intake contributes to [[obesity]] if not balanced with exercise.

Until the 1980s, soft drinks obtained nearly all of their [[food energy]] in the form of refined cane [[sugar]] or [[corn syrup]]. Today in the United States [[high-fructose corn syrup]] (HFCS) is used nearly exclusively as a sweetener because of its lower cost, while in [[Europe]], [[sucrose]] dominates, because [[European Union|EU]] agricultural policies favor production of [[sugar beet]]s in Europe proper and [[sugarcane]] in the former colonies over the production of corn. HFCS has been criticized as having a number of detrimental effects on human health, such as promoting diabetes, hyperactivity, hypertension, and a host of other problems.<ref>{{cite web|url=http://www.westonaprice.org/motherlinda/cornsyrup.html |title=The Murky World of High Fructose Corn Syrup |publisher=Westonaprice.org |date= |accessdate=2009-06-08}}</ref> Although [[anecdotal evidence]] has been presented to support such claims, it is well known that the human body breaks sucrose down into [[glucose]] and [[fructose]] before it is absorbed by the intestines. Simple sugars such as fructose are converted into the same intermediates as in glucose metabolism.<ref>[http://www.uic.edu/depts/mcam/mcbc/lect_2004/lecture_21.pdf Pathways for the Interconversion of Sugars, University of Illinois Chicago, Medical Biochemistry 531, Lecture 21]{{Dead link|date=June 2009}}</ref> However, metabolism of fructose is extremely rapid and is initiated by fructokinase. Fructokinase activity is not regulated by metabolism or hormones and proceeds rapidly after intake of fructose. While the intermediates of fructose metabolism are similar to those of glucose, the rates of formation are excessive. This fact promotes [[fatty acid]] and [[triglyceride]] synthesis in the liver, leading to accumulation of fat throughout the body and possibly [[non-alcoholic fatty liver disease]]. Increased blood lipid levels also seem to follow fructose ingestion over time.

==Government regulation==
===Schools===
In recent years, debate on whether high-calorie soft drink [[vending machine]]s should be banned in school has been on the rise. Proponents believe that soft drinks are a significant contributor to [[childhood]] [[obesity]] and [[tooth decay]], and that allowing soft drink sales in schools encourages children to believe they are safe to consume in moderate to large quantities. Proponents note that children are not always mature enough to understand the consequences of their own food choices, and should not be routinely exposed to the temptation of readily available soft drinks. They also argue that schools have a responsibility to look after the health of the children in their care, and that allowing children easy access to soft drinks violates that responsibility. Opponents believe that obesity is a complex issue and soft drinks are not the only cause. They also note the immense amount of funding soft drink sales bring to schools. Some people{{Who|date=October 2008}} take a more moderate stance, saying that soft drink machines should be allowed in schools, but that they should not be the only option available. They propose that when soft drink vending machines are made available in school grounds, the schools should be required to provide children with a choice of alternative drinks (such as [[fruit juice]], flavored [[water]] and [[milk]]) at a comparable price. Fruit drinks are often available, with a fruit juice content of less than 100%, and additives such as water and flavorings and colorings. Fruit drinks sometimes contain as many carbohydrates as the soft drinks they replace.

On 3 May 2006, the [http://www.healthiergeneration.org/ Alliance for a Healthier Generation], [[Cadbury Schweppes]], [[Coca-Cola]], [[PepsiCo]], and the [[American Beverage Association]] announced new [http://www.healthiergeneration.org/schools.aspx?id=108 School Beverage Guidelines] that will voluntarily remove high-calorie soft drinks from all U.S. schools.

On 19 May 2006, UK Education Secretary Alan Johnson announced new minimum nutrition standards for school food. Amongst a wide range of measures, from September 2006, school lunches will be free from carbonated drinks. Schools will also end the sale of junk food (including carbonated drinks) in vending machines and [[tuck shops]]. See the Department for Education and Skills [http://www.dfes.gov.uk/pns/DisplayPN.cgi?pn_id=2006_0074 press notice] for details.

===Pesticides in India===

In 2003, the Delhi non-profit Centre for Science and Environment published a disputed report finding [[pesticide]] levels in Coke and Pepsi soft drinks sold in India at levels 30 times that considered safe by the European Economic Commission.<ref>http://www.business-standard.com/india/news/coke-sales-fall-11pesticide-controversy/159950/</ref><ref>http://www.businessweek.com/globalbiz/content/may2007/gb20070531_868198_page_3.htm</ref> The Indian Health Minister said the CSE tests were inaccurate, and said that the government's tests found pesticide levels within India's standards but above EU standards.<ref>http://edition.cnn.com/2003/WORLD/asiapcf/south/08/21/india.drinks/</ref><ref>http://pqasb.pqarchiver.com/sandiego/access/387857181.html?dids=387857181:387857181&FMT=ABS&FMTS=ABS:FT&type=current&date=Aug+22%2C+2003&author=Nirmala+George&pub=The+San+Diego+Union+-+Tribune&desc=Colas+called+safe%2C+but+not+at+EU+standards&pqatl=google</ref>

A similar CSE report in August 2006 prompted many state governments have issued a ban of the sale of soft drinks in schools. [[Kerala]] issued a complete ban on the sale or manufacture of soft drinks altogether. (These were later struck down in court.) In return, the soft drink companies like Coca Cola and Pepsi have issued ads in the media regarding the safety of consumption of the drinks.<ref>BBC (Sanjoy Majumder) [http://news.bbc.co.uk/2/hi/south_asia/4776623.stm Indian state bans Pepsi and Coke] 9 August 2006</ref>

The UK-based Central Science Laboratory, commissioned by Coke, found its products met EU standards in 2006.<ref>http://news.bbc.co.uk/2/hi/south_asia/4789615.stm</ref> Coke and the [[University of Michigan]] commissioned an independent study of its bottling plants by The Energy and Resources Institute (TERI), which reported in 2008 no unsafe chemicals in the water supply used.<ref>http://www.usatoday.com/news/world/2008-01-15-999850862_x.htm</ref>

===Benzene===
{{Main|Benzene in soft drinks}}
In 2006, the United Kingdom [[Food Standards Agency]] published the results of its survey of benzene levels in soft drinks,<ref>{{cite web|url=http://www.food.gov.uk/news/newsarchive/2006/mar/benzenesurvey |title=of benzene levels in soft drinks |publisher=Food.gov.uk |date=2006-03-31 |accessdate=2009-06-08}}</ref> which tested 150 products and found that four contained benzene levels above the [[World Health Organization]] (WHO) guidelines for drinking water. The agency asked for these to be removed from sale.

The United States [[Food and Drug Administration]] released its own test results of several soft drinks containing benzoates and ascorbic or erythorbic acid. Five tested drinks contained benzene levels above the [[United States Environmental Protection Agency|Environmental Protection Agency's]] recommended standard of 5 [[parts per billion|ppb]]. The Environmental Working Group<ref>[http://www.ewg.org/issues/toxics/20060404/index.php ]{{Dead link|date=June 2009}}</ref> has uncovered additional FDA test results that showed the following results: Of 24 samples of diet soda tested between 1995 and 2001 for the presence of benzene, 19 (79%) had amounts of benzene in excess of the federal tap water standard of 5 ppb. Average benzene levels were 19 ppb, about four times tap water standard. One sample contained 55 ppb of benzene, 11 fold tap water standards. Despite these findings, as of 2006, the FDA stated its belief that "the levels of benzene found in soft drinks and other beverages to date do not pose a safety concern for consumers".<ref>[http://web.archive.org/web/20080326000127/www.cfsan.fda.gov/~dms/benzqa.html US FDA/CFSAN - Questions and Answers on the Occurrence of Benzene in Soft Drinks and Other Beverages]{{Dead link|date=June 2009}}</ref>

==Alcohol content==
A report in October 2006 demonstrates that some soft drinks contain measurable amounts of alcohol.<ref>{{cite web|url=http://www.zaman.com/?bl=economy&alt=&hn=37342 |title=Today's Zaman |publisher=Zaman.com |date=2006-10-14 |accessdate=2009-06-08}}</ref> In some older preparations, this resulted from natural fermentation used to build the carbonation. Modern drinks use introduced carbon dioxide but alcohol might result from fermentation of sugars in an unsterile environment. A small amount of alcohol is introduced to at least some soft drinks where alcohol is used in the preparation of the flavoring extracts.<ref>{{cite web|url=http://www.mail-archive.com/mymasjid@yahoogroups.com/msg00028.html |title=[myMasjid.com.my&#93; Alcohol: In soft drinks |publisher=Mail-archive.com |date=2004-11-08 |accessdate=2009-06-08}}</ref> The Turkish soft drink manufacturer whose product was listed as highest in alcohol in the October 2006 study noted that the naturally occurring alcohol level in soft drinks is 1.56 times higher than that found in [[Kool-Aid]].<ref>[http://english.sabah.com.tr/AF9128D8A63B49A897868E88404D320D.html SABAH Newspaper English Edition<!-- Bot generated title -->]{{Dead link|date=June 2009}}</ref>

== See also ==
* [[Ade]]
* [[Diet soda]]
* [[Fizz keeper]]
* [[List of soft drinks by country]]
* [[Low-alcohol beer]]
* [[Premix and postmix]]

== References ==
{{Reflist|2}}

== External links ==
{{Wiktionary|soft drink}}
* [http://popvssoda.com:2998/ The Great Pop vs. Soda Controversy]
* [http://www.chrismore.com/sodapop/ The Soda Pop Mashup!]
* [http://www.invisiblekillers.com/resources/articles/soft-drinks.php Health Focus: Toxins in Soft Drinks]
* [http://www.ameribev.org/schools/state%20regulations.pdf State Laws & Regulations Governing Beverage Sales in Schools], American Beverage Association (PDF format)
* [http://www.usatoday.com/news/health/2005-08-16-soda-schools_x.htm "Beverage group: Pull soda from primary schools"], ''[[USAToday]]'', August 17, 2005
* [http://www.boston.com/yourlife/health/fitness/articles/2006/05/04/after_soda_ban_nutritionists_say_more_can_be_done/ "After soda ban nutritionists say more can be done"], ''[[Boston Globe]]'', May 4, 2006
* [http://www.nytimes.com/2005/08/22/business/22soda.html?ex=1282363200&en=a685e9de086c15d0&ei=5088&partner=rssnyt&emc=rss "Critics Say Soda Policy for Schools Lacks Teeth] [[New York Times]], August 22, 2005
* [http://aappolicy.aappublications.org/cgi/content/full/pediatrics;113/1/152 "Soft Drinks in Schools"], [[American Academy of Pediatrics]],
* [http://www.medbio.info/Horn/Sugars4Kids/introduction.htm] Sugars4Kids
* [http://historyofalcoholanddrugs.typepad.com/alcohol_and_drugs_history/soft_drinks/index.html Soft drinks news page]
* [http://longevity-science.blogspot.com/2007/05/soft-drinks-linked-to-aging.html "Soft drinks linked to aging"], Longevity-science.com blog by Leonid A. Gavrilov
* [http://inventorspot.com/ten_bizarre_japanese_soft_drinks "Unusual Soft Drinks from Japan"], Japanese Innovations blog by Steve Levenstein

[[Category:Soft drinks| ]]

[[ar:مشروب غازي]]
[[bo:རླངས་ཆུ།]]
[[da:Sodavand]]
[[de:Erfrischungsgetränk]]
[[es:Gaseosa]]
[[fa:نوشابه]]
[[fr:Soda]]
[[ko:청량 음료]]
[[hi:शीतल पेय]]
[[id:Minuman ringan]]
[[iu:ᐃᒥᒐᖅ/imrujaq]]
[[is:Gosdrykkur]]
[[he:משקה תוסס]]
[[nl:Frisdrank]]
[[ja:ソフトドリンク]]
[[no:Brus]]
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[[pl:Napój bezalkoholowy]]
[[pt:Refrigerante]]
[[ro:Băutură răcoritoare]]
[[simple:Soft drink]]
[[sl:Gazirana pijača]]
[[fi:Virvoitusjuoma]]
[[sv:Läskedryck]]
[[tl:Sopdrink]]
[[th:น้ำอัดลม]]
[[zh-yue:汽水]]
[[bat-smg:Nealkuohuolėnės gierals]]
[[zh:軟性飲料]]

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