|WikiProject Chemicals||(Rated Start-class, Mid-importance)|
|WikiProject Alternative medicine||(Rated Start-class)|
Inorganic and bioinorganic chemists would be absolutely delighted by some good evidence for a biological role for Cr, but such evidence is lacking. Of course, it is always possible that some ultra-trace amounts influence human health or dont really bother us. Furthermore, if such extremely small amounts are healthy, it is likely that humans ingest sufficient Cr without trying. Against this backdrop exists a thriving mineral supplements industry that strives to convince the population that chromium picolinate is a good thing to buy and ingest. Some producers also fund research demonstrating efficacy, supposedly. But these reports can be affected by serious conflicts of interest between the researchers and the manufacturers.--Smokefoot (talk) 17:28, 18 September 2008 (UTC)
- Positive findings
- Negative findings
- PMID 17291720 saw no effect on weight loss in people fed a calorie-controlled diet.
- PMID 10819315 saw no effect on insulin sensitivity, serum lipids, or body composition in elderly people
- PMID 8776075 saw no effect on body fat or weight loss in people losing weight through exercise.
- PMID 11506057 saw no effect on body composition in people losing weight through exercise.
- So the balance of evidence is that CrPi is ineffective in producing weight loss. Tim Vickers (talk) 20:43, 18 September 2008 (UTC)
I inserted a nutshell summary on the health effects section. As User:Jevansen reminded readers, nutshells are usually reserved for Wikipolicy discussions, but my suggestion is that nutshells could be useful in articles where a lot of complicated jargon is reviewed, but all the jargon points to the same general conclusion. (Ideally, the script for the nutshell could be revised, I agree. It should read "This section in a nutshell" vs "This page in a nutshell: "). My sense is that just because this signage is mainly used by bureaucrats is no reason that it cannot be useful for content. Debate and discussion welcome! But I recommend that we keep it until we hear cogent comments against its use.--Smokefoot (talk) 14:07, 17 January 2010 (UTC)
- I reverted your addition to the article due to WP:POV and WP:NDA concerns. Template:Nutshell isn't meant for the article namespace. I feel that this addition isn't appropriate for Wikipedia. The statement and its wording appears biased. The statement also appears in a relatively large and highly visible template that would divert any reader's attention from the rest of the section's material. It should also be noted that there shouldn't be disclaimers in articles. --Michaeldsuarez (talk) 20:01, 31 January 2010 (UTC)
- Thanks for the comments. The reason that I resisted (or at least reverted) is encapsulated by your approach "isn't meant for the article namespace." (Dear child, some things just aren't meant to be, sorry.). And the implication that because the statement describes a stance that it is non-NPOV. This ultra-bland approach could be described as a tortured form of wiki-speak, an avoidance POV in the name of a non-existent NPOV. Oh well, it was an experiment, and I figured it would be slapped down.--Smokefoot (talk) 20:29, 31 January 2010 (UTC)
The natural form of chromium from yeast is better, cheaper, and not patented. Its omission is NPOV ad copy
Some reference needs be made in this article to Glucose Tolerance Factor (GTF) chromium. There is a large advertising-like bias in favor of the commercial picolinate product by the complete omission of GTF.
The natural form of chromium from yeast (GTF chromium) is has better-established health effects, and is cheaper. GTF chromium is not patented, because it cannot be - it's a natural substance. Chromium Picolinate was an attempt to profit by patenting an analogue to the beneficial GTF chromium, and it was heavily promoted based on very thin research, and without mention of GTF chromium. I believe the FDA finally cracked down on the claims.
Glucose tolerance factor (GTF) in Wikipedia redirects to Chromium deficiency, which lays out the threadbare claims for picolinate without ever directly mentioning Glucose Tolerance Factor chromium.
Chromium picolinate is the most commonly used synthetic supplement. However, recent studies "have concluded that such supplements have no demonstrated effects on healthy individuals." A meta-analysis in 2002 found no effect on blood glucose or insulin in healthy people, and the data were inconclusive for diabetics. Subsequent trials gave mixed results, with one finding no effect in people with impaired glucose tolerance, but another seeing a small improvement in glucose resistance. In a 2007 review of these and other clinical trials it was again concluded that chromium supplements had no beneficial effect on healthy people, but that there might be an improvement in glucose metabolism in diabetics, although the authors stated that the evidence for this effect remains weak.
A 2003 pilot trial of 15 patients suggested that chromium picolinate might have antidepressant effects in atypical depression. A larger trial in 2005 set up to test this finding found no effect on depression in its test group, but suggested that the use of chromium supplementation could help to reduce carbohydrate cravings and regulate appetite in these patients. A post-hoc analysis of a subpopulation of patients in this study that experienced high carbohydrate cravings suggested that these patients experienced significant improvements in their depression compared to those treated with a placebo.
This supplement is purported to correct imbalances in glucose metabolism due to chromium deficiency, even though the occurrence of such a deficiency is extremely rare in countries where the supplement is sold. The mechanism by which this complex enters the cells in the body differs from that for the introduction of trivalent chromium found naturally in food does, and for this reason the safety of this supplement is debatable, since chromium is toxic at high levels.
Although it is controversial if supplements should be taken by healthy adults eating a normal diet, chromium is needed as a component of the defined liquid diet that is given to patients receiving total parenteral nutrition (TPN), since deficiency can occur after many months of this highly restricted diet. As a result chromium is added to normal TPN solutions, although the trace amounts from even in supposedly "chromium free" preparations may be enough to prevent deficiency in some individuals. Indeed, a 1992 paper in The Lancet suggested that adding chromium to feeding solutions given to children produces excessive levels of this metal in their bodies.
- It is not clear if you are making a recommendation or what about these articles. --Smokefoot (talk) 15:10, 11 February 2012 (UTC)
I'm curious as to the theme of this article. I would expect more time and energy spent identifying WHAT chromium picolinate actually is. If shots are to be fired regarding its efficacy one would expect that in a later paragraph vs. opening sentences. The credibility of the current article is in question -and must be discounted as biased until this is modified. — Preceding unsigned comment added by Akirakhan (talk • contribs) 17:54, 23 April 2012 (UTC)
Chromium picolinate not the healthiest chromium compound - PMID 12656641
Chromium picolinate called "amazingly popular" but not the healthiest choice:
The potential value and toxicity of chromium picolinate as a nutritional supplement, weight loss agent and muscle development agent.
Sports Med. 2003;33(3):213-30.
- However, over a decade of human studies with Cr(pic)(3) indicate that the supplement has not demonstrated effects on the body composition of healthy individuals, even when taken in combination with an exercise training programme. Recent cell culture and in vivo rat studies have indicated that Cr(pic)(3) probably generates oxidative damage of DNA and lipids and is mutagenic, although the significance of these results on humans taking the supplement for prolonged periods of time is unknown and should be a focus for future investigations. Given that in vitro studies suggest that other forms of chromium used as nutritional supplements, such as chromium chloride, are unlikely to be susceptible to generating this type of oxidative damage, the use of these compounds, rather than Cr(pic)(3), would appear warranted. — Preceding unsigned comment added by Ocdnctx (talk • contribs) 17:37, 12 October 2012 (UTC)
Chromium picolinate mutagenic breakdown products
Chromium picolinate is long-lasting in the body, and can be altered to forms that create free radical damage.
Speetjens JK, Collins RA, Vincent JB, Woski SA.
The nutritional supplement chromium (III) tris(picolinate) cleaves DNA.
Chem Res Toxicol 1999;12:483–7
'Chromium(III) tris(picolinate) [Cr(pic)3] is currently a very popular nutritional supplement; however, its safety has recently been questioned, especially with regard to its ability to act as a clastogen. At physiologically relevant concentrations, Cr(pic)3 is reduced by biological reductants, including ascorbate and thiols, to Cr(II)-containing species. These species are susceptible to air oxidation, resulting in the catalytic generation of the potent DNA-damaging agent hydroxyl radical.' In the absence of reductants, H2O2 can interact with Cr(pic)3 to produce hydroxyl radicals by a second, less efficient mechanism. Cr(pic)3 is extremely stable, which allows the complex to be readily absorbed but also to potentially be incorporated into cells intact. In this form, Cr(pic)3 is primed by its redox potential to enter into the generation of hydroxyl radicals. This study suggests that investigation of the long-term effects of supplementation of the diet with Cr(pic)3 are needed to assess the safety of this material.