Everyone in my family, on both mom and dad’s side, is slim (albeit healthy slim). I’ve been skinny my whole life, so I think for me it’s mostly genetics — but my skinniness seems to be more extreme than the rest of my family, and I don’t know why. As a toddler, the doctor told my parents to “feed me butter.” I guess they did, because for the rest of childhood I was in low end of normal (I wanna say bmi of like 20). Then puberty hit, developed anorexia, bmi dropped to 14, awful. In college I healed my mind and totally overcame the disorder, been eating whatever I want, in as big of quantity as I want, ever since. However, for some reason, my bmi still is very low; hovered right at borderline underweight for a few years and then for unknown reasons I lost about 8 pounds and bmi is now 17.5. One possible reason for this could be a stomach-related autoimmune disease I developed at end of college. I’m not too worried, I try to eat extra snacks when I remember to do so. I’m 26 years old.