David Lightsey, M.S., is a food and nutrition science advisor with Quackwatch.org, combating nutrition and health misinformation on a national level. He is the author of "The Myths About Nutrition Science," a voting member with the Creation Research Society and a retired adjunct college professor in nutrition. He is a well-seasoned junk-science spotter (33 years) with appearances on NBC "Dateline," "CBS Evening News," etc. Visit Lightsey's website.