Evidence Level
Chromium supplementation evidence is mixed but leans positive for blood sugar management. A comprehensive meta-analysis by Balk et al. (2007, 41 RCTs) found modest improvements in glycemic control among type 2 diabetes patients, with the strongest effects at doses of 200-1,000mcg chromium picolinate. The Anderson et al. (1997) China trial remains the most cited positive study, showing significant HbA1c reduction with 1,000mcg/day. However, the ADA does not recommend routine chromium supplementation for diabetes due to inconsistency across trials. For weight loss, a Cochrane review found effects too small to be clinically meaningful.