Tuesday, October 11, 2011

Nutrient supplementation and mortality

A large cohort study from Iowa found an association between use of certain nutrient supplements (multivitamins and iron in particular) and overall mortality. Calcium had a protective effect, though there was no dose-response relationship. The authors adjusted for a number of other variables, including age, education, geography, medical comorbidities, and other factors.

Considering that millions of people take vitamin and mineral supplements with the intention of reaping health benefits that may not actually be present, this study provides some food for thought.

Link: Arch Intern Med 2011;171(18):1625