I just stumbled over a very interesting presentation from Robert Lustig (professor of pedeatrics) on sugar, which is, in my opinion, really interesting and I thought I'll share this.

Sugar: The Bitter Truth - YouTube

Here the information regarding this video:

"Robert H. Lustig, MD, UCSF Professor of Pediatrics in the Division of Endocrinology, 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."