Recent attention has been focused on three commonly used, over-the counter supplements and weight loss pills which contain chromium. According to test results by Consumer Labs, a private provider of independent testing of health products, a carcinogenic form of chromium, known as hexavalent chromium, was found in three of these products that are currently on the market. (The three products in question are not listed in this article, because of copyright laws, but a list of these weight-loss supplements, along with others that did pass testing by Consumer Labs, can be obtained at Consumer Labs online).
Hexavalent chromium, or chromium (VI) is a more toxic form of chromium than the nutrient, chromium (III). It should not be found in chromium supplements, but it has occurred as a contaminant in some cases. It is known to be a human carcinogen and can cause other harmful health effects such as kidney and liver damage.
Source: “Carcinogen Found in Several Chromium Supplements (Including Some for Weight Loss)”, Consumer Labs, March 3, 2010
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