Changing public attitudes have led to a decline in U.S. soda sales. But health expert Marion Nestle believes many people still consume unhealthy amounts of sugary drinks. She argues beverage companies are spending millions on research that misleads consumers.
Doctors and researchers discuss the benefits and risks of vitamin D and why some Americans may not be getting enough of it.
- Joan Lappe professor of nursing and medicine at the Creighton University School of Medicine and investigator with Creighton's Osteoporosis Research Center.
- Joan McGowan Director, Musculoskeletal Diseases Branch and the Bone Diseases Program at the National Institute of Arthritis and Musculoskeletal and Skin Diseases.
- Paul Coates Director, Office of Dietary Supplements, National Institutes of Health
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