Story from New York Magazine about a Calorie Restriction diet subculture. That is, people who eat as few calories per day as they can, carefully measuring out exactly the nutrient quantities their body needs and not a scrap more, with the hope that it will add (all things being equal) decades to their lifespan.

I had heard about the experiments with lab animals, where it's proven to work, but didn't know that people were doing this. I imagined that nobody would want to live in a state of constant hunger.

This sounds exactly like the sort of thing I'd jump into wheeee and then forget about two days later. Still quite intriguing.