I'm really worried about my younger brother. He's 15, 6'5'', and weighs 9 stone. He's always been relatively slim, but his BMI is 15. Surely this is ridiculous? He used to eat a lot (and I mean a lot) and just maintain his weight, so we just assumed that was the way he was. But now, he's starting to restrict food like I do. If I turn down dessert, so will he, and then he'll be very defensive if we explain to him why I'm restricting, and why he doesn't need to.
I feel guilty because I'm the one who's brought the whole concept of restriction into the family, but I can't start eating more just so that he will- because then I'll be an unhealthy weight again!
Anyone got any experience of maybe the onset/triggers of an eating disorder? Just because I'm worried as he doesn't need to restrict at all.