<human>: Give me a shortened version of the text

Hello! 
My hubby told me about loseit, and I figured I'd drop in and introduce myself and ask a question. 

I am 243 lbs (down from 250 a week and a half ago). I saw a doc who put me on phentermine, which has resulted in the first and only time I've lost weight that did not involve... well... almost dying (long story). 

I gained my weight through pregnancies. I've never gained weight at a time other than pregnancy- no matter what quantity of food I eat.

So the question: 
Have you  heard of/known folks who could only eat tiny quantities of calories?  I am /not/ anorexic- but since on this phentermine, I went from about 12-14k calories down to below 1k. I feel ... well... Great!

I work out, doing pilates or other things at MINIMUM twice a week, but I'm also pretty active in general- can't sit still. I don't exactly live a lifestyle that has obvious reasons for my obesity. 

Doc said it's likely genetics- since my whole family has body types similar to mine.
<bot>: Do you know of some genetic condition or do you know anyone who comfortably and happily lives with eating very small quantities of food?