From www.consumerlab.com : Magnesium: 17 of 19 products pass testing. Failures on dose and lead contamination. Weight Loss, Slimming, and Diabetes-Management Supplements (Chromium, CLA, and Pyruvate): More than one in five supplements fail ConsumerLab.com evaluation. ConsumerLab.com is currently testing... Omega-3 and 6 Fatty Acids (from Evening Primrose, Flaxseed, and Borage Oils), Potassium Supplements, Iodine Prophylaxis Supplements for Nuclear Accidents (Potassium Iodide), Garlic, and Sexual Enhancement Supplements Theola