A killer burger. Fantastically communicative photo by Johanna Parkin.

David A. Kessler on our creeping diet:

For years I wondered why I was fat. I lost weight, gained it back, and lost it again – over and over and over. I owned suits in every size. As a former commissioner of the FDA (the US Food and Drug Administration), surely I should have the answer to my problems. Yet food held remarkable sway over my behaviour.

The latest science seemed to suggest being overweight was my destiny. I was fat because my body’s “thermostat” was set high. If I lost weight, my body would try to get it back, slowing down my metabolism till I returned to my predetermined set point.

But this theory didn’t explain why so many people, in the US and UK in particular, were getting significantly fatter. For thousands of years, human body weight had stayed remarkably stable. Millions of calories passed through our bodies, yet with rare exceptions our weight neither rose nor fell. A perfect biological system seemed to be at work. Then, in the 80s, something changed.

More at the Guardian.