Recently, China’s General Administration of Quality Supervision, Inspection and Quarantine discovered trace amount of chromium and neodymium in SK-II skin care products. Then we saw all kinds of news about the refund and the unfair waiver form etc. I don’t know anything about this brand of cosmetics. But I happened to research the amount of chromium that’s needed by a human, for a completely different reason.
I found most vitamin and mineral supplements (e.g. Centrum) have chromium. A warning was posted on the label: diabetes or hypoglycemia patients need to consult doctor before taking the supplements. Why? I googled the web and seemed to have found the answer.
It is generally believed that chromium is an essential trace mineral for human body, while excess intake of chromium may have several undesired effects. However, different sources draw different conclusions.
UC Berkeley Wellness Letter presents a negative view about chromium [1]: There’s little evidence that chromium deficiency is widespread. Some very preliminary research suggests that chromium picolinate can reduce blood sugar in people with Type 2 diabetes, the most common form of the disease. But that’s a far cry from a reliable treatment for diabetes, which is not a chromium-deficiency disease. There is no good evidence backing chromium picolinate as a weight-loss aid, a muscle-builder, or a way to reduce blood cholesterol levels. This new evidence does suggest that it may have serious side effects. Nobody should take chromium picolinate, especially not young people.
However, other sources suggest differently. Briggs presents a double blind study in China [2]. The result indicates that daily intake of 1,000 mcg chromium have shown consistent improvement on type II diabetes. Similar results have been obtained by scientists at Agriculture Department’s Beltsville Human Nutrition Research Center. A chemical explanation is also presented [3]. Because chromium may potentially treat diabetes, it may interfere with other drugs. This explains the warning message on the bottle of supplements.