Nature Wants Us to be Fat:  The Surprising Science Behind Why we Gain Weight and How We Can Prevent and Reverse it.  University of Colorado Medical School Professor Rick Johnson shares why he thinks eating lots of fructose sugars can trigger a Survival Switch that helps bears put on weight before they hibernate . . . . and also why whales, which don’t eat any sugar, carry a lot of f to why whales are fat, and how foods affect our hunger and satiety.

GO HERE for extended interview (1 hour) and transcript.

Host/Producer: Shelley Schlender

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