The following lecture is a real must for anyone who wants to understand the biochemical roots of the obesity epidemic and what we need to do to turn it around. See Sugar: The Bitter Truth on YouTube a lecture by Robert H. Lustig, MD, UCSF Professor of Pediatrics in the Division of Endocrinology. He explores the damage caused by sugary foods. He argues that fructose (too much) and fiber (not enough) appear to be cornerstones of the obesity epidemic through their effects on insulin. Series: UCSF Mini Medical School for the Public [7/2009].