I fast at least 6 days/year for religious reasons. 3 are 12 hour fasts, and 3 are 25 hour fasts. It really does feel good, and I don't think it's harmful. I'm very consciousness about my weight in general, and this is accomplished by strict calorie counting.

You'll notice that the vast majority Silicon Valley CEOs are not overweight, and I believe it is an unspoken "filter" they use to judge a person (whether this is right/just/moral is another story). There seems to be a belief that if a person isn't disciplined enough to be in charge of his hunger, then he's not disciplined.

> At 5’11” and 165lbs, Woo doesn’t need to lose weight, although he did drop 12lbs over the week.

Well, I'm an inch shorter and 15# less. I don't think 5'11 and 165 is particularly skinny!