A member asked:

My boyfriend eats a lot and he is so thin (underweight)and when he eats food that should make you gain weight he lose weight.how this can be possible?

A doctor has provided 1 answer
Dr. Heidi Fowler answered

Specializes in Psychiatry

He is likely: Still growing, is possibly physically active? And most probably has a high metabolic rate. Take care.

Answered 3/27/2014

4.3k views

Thank

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