More Doubt About Benefits of Vitamin D and Omega-3 Supplements
The landmark VITAL study tested the ability of vitamin D and omega-3 (fish oil) supplements—two of the top-selling dietary supplements—to protect against a wide array of diseases. The Harvard-run trial included more than 25,000 generally healthy adults ages 50 and older who were randomly assigned to take vitamin D (2,000 international units, or IU, a…