Study Finds No Benefit for Dietary SupplementsPosted on April 16th, 2019 by Dr. Francis CollinsCredit: iStock/Artfully79More than half of U.S. adults take dietary supplements . The researchers, led by Fang Fang Zhang, Tufts University, Boston, were intrigued that so many people take dietary supplements, despite questions about their health benefits. Just over half of participants reported use of dietary supplements in the previous 30 days. The researchers found the use of dietary supplements had no influence on mortality. For example, study participants who reported taking dietary supplements generally had a higher level of education and income.