Dietary Supplements: Fact versus Fiction - Paperbackby Myrna Chandler Goldstein (Author), Mark A. Goldstein (Author) This accessibly written book examines the most commonly taken dietary supplements, exploring what they are and what they're purported to do, and summarizing key research findings regarding their potential health benefits and risks. Today, more than 50 percent of Americans take at least one type of dietary supplement regularly. But do these products actually work? How are they regulated?