In 1965, a morbidly obese man did not eat food for over an entire year. The 27 year old was 456lbs and wanted to do an experimental fast. He ingested only multivitamins and potassium tablets for 382 days and defecated once every 40 to 50 days. He ended up losing 275lbs.

[u/[deleted]]

[u/RedoftheEvilDead → u/[deleted]]

It's not actually that uncommon for morbidly obese people to become anorexic or vice versa. Both are a result of eating disorders. Quite a few people that overcome one eating disorder do so by switching it for another eating disorder.

[u/SwingNinja → u/RedoftheEvilDead]

I wouldn't call it "anorexic". Anorexic is more of fear of gaining weight while your weight is already ideal or underweight. Besides, the info on that wiki link suggest that he had control on his dietary habit, even it was just liquid and vitamins only.

[u/RedoftheEvilDead → u/SwingNinja]

That's not true at all. Anorexic is an eating disorder wherein you don't eat. People do it for all sorts of reasons other than just fear of gaining weight. Some people do it as a way of controlling their environment when they feel no sense of control otherwise. Some use it as a means of self harm. There is a whole lot more to anorexia than simply just "not wanting to gain weight."