Federal government: Supplements don’t prevent cancer

Over-the-counter supplements are unlikely to protect against cancer, heart disease or overall risk of death, according to new guidelines from the U.S. Preventive Services Task Force, published in the journal JAMA in June. After reviewing 84 studies, the task force concluded that there were no life-extending benefits associated with taking beta carotene, calcium, selenium, or vitamins A, B3, B6, C, D and E. The new guidelines warn Americans to avoid any beta carotene supplementation due to potential cancer risk.