Pungency (/ˈpʌn(d)ʒənsi/) is the condition of having a strong, sharp smell or taste that is often so strong that it is unpleasant. Pungency is the technical term used by scientists to refer to the characteristic of food commonly referred to as spiciness or hotness and sometimes heat, which is found in foods such as chili peppers.
The term piquancy (/ˈpiːkənsi/) is sometimes used to refer to a lower degree of pungency (than that of chilli) such as that of mustard, but it more often refers to mild pungency and flavors and spices that are much less strong than chilli peppers, including, for example, the strong flavor of some tomatoes. In other words, pungency always refers to a very strong taste whereas piquancy refers to any spices and foods that are "agreeably stimulating to the palate", in other words to food that is spicy in the general sense of "well-spiced".
The terms "pungent" (i//) and "pungency" are rarely used in colloquial speech but are preferred by scientists as they eliminate the potential ambiguity arising from use of the words "hot" and "spicy", which can also refer to temperature and the presence of spices, respectively.
For instance, a pumpkin pie can be both hot (out of the oven) and spicy (due to the common inclusion of spices such as cinnamon, nutmeg, allspice, mace, and cloves), but it is not pungent. (A food critic may nevertheless use the word "piquant" to describe such a pie, especially if it is exceptionally well seasoned.) Conversely, pure capsaicin is pungent, yet it is not naturally accompanied by a hot temperature or spices.
As the Oxford, Collins, and Merriam-Webster dictionaries explain, the term "piquancy" refers to mild pungency and flavors and spices that are much less strong than chilli peppers, including, for example, the strong flavor of some tomatoes. In other words, pungency always refers to a very strong taste whereas piquancy refers to any spices and foods that are "agreeably stimulating to the palate", in other words to food that is spicy in the general sense of "well-spiced".
In foods 
Pungency is not considered a taste in the technical sense because it is carried to the brain by a different set of nerves. While taste nerves are activated when consuming foods like chili peppers, the sensation commonly interpreted as "hot" results from the stimulation of somatosensory fibers in the mouth. Many parts of the body with exposed membranes that lack taste receptors (such as the nasal cavity, genitals, or a wound) produce a similar sensation of heat when exposed to pungent agents.
The pungent sensation provided by chili peppers, black pepper and other spices like ginger and horseradish plays an important role in a diverse range of cuisines across the world, such as Korean, Persian, Turkish, Ethiopian, Hungarian, Indian, Burmese, Indonesian, Laotian, Singaporean, Malaysian, Bangladeshi, Mexican, Peruvian, Caribbean, Pakistani, Southwest Chinese (including Sichuan cuisine), Sri Lankan, Vietnamese, and Thai cuisines.
In beverages 
Recently beverage products are emerging with capsaicin as an active ingredient. The first two capsaicin beverages to hit the market[dubious ] are Prometheus Springs Elixirs launched in 2007 and Sweet16 launched in 2011. It is common for people to experience pleasurable and even euphoriant effects from ingesting capsaicin. Folklore among self-described "chiliheads" attributes this to pain-stimulated release of endorphins, a different mechanism from the local receptor overload that makes capsaicin effective as a topical analgesic. In support of this theory, there is some evidence that the effect can be blocked by naloxone and other compounds that compete for receptor sites with endorphins and opiates.
In popular culture 
In animated cartoons and the like, pungency is often shown as a face turning red or as though a mouth were literally on fire, with such sight gags as flames and smoke coming out of the mouth and ears (sometimes accompanied by a train whistle) when someone consumes pungent food.
The scientific term for the effect of pungency is chemesthesis. Substances such as piperine and capsaicin cause a burning sensation by inducing a trigeminal nerve reaction together with normal taste reception. The pungent feeling caused by allyl isothiocyanate, capsaicin, piperine, and allicin is caused by activation of the heat thermo- and chemosensitive TRP ion channels including TRPV1 and TRPA1 nociceptors. The pungency of chilies may be an adaptive response to selection by microbial pathogens.
See also 
- Collins English Dictionary: "Pungency"
- Merriam-Webster Dictionary: "Pungent"
- Berenbaum, May R. (May 16, 2008). "Evolutionary ecology of pungency in wild chilies". Proceedings of the National Academy of Sciences of the United States of America. Retrieved September 16, 2012.
- "Chile Terminology". Chile Pepper Institute, New Mexico State University. 2006. Retrieved September 14, 2012.
- "Chile Heat". Chile Pepper Institute, New Mexico State University. 2006. Retrieved September 14, 2012.
- "Why are not all chilies hot? A trade-off limits pungency". Royal Society Publishing. Retrieved September 16, 2012.
- Latif, Ray (May 30 and June 7, 2011). "Extreme and Edgy Flavors". Beverage Spectrum Magazine and Bevnet.com. Retrieved 25 February 2012.
- Lee, Kendra Stanton (March 2011 and April 14, 2011). "Slimming Prospects". Beverage Spectrum Magazine and bevnet.com. Retrieved 25 February 2012.
- Capsaicin Products at Prometheus Springs
- Sweet 16 Product overview
- Mary Ann Liebert, Inc. - The Journal of Alternative and Complementary Medicine - 8(3):341
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