hi there,i would realy apreciate your help,for the last 4 years now i have not been able to put on any weight wot so ever,i am 23 years old,and a height of 5/8,i only weigh 8 stone i am clearly under weight,i have always been a very big eater and have always eaten a mixed variety of foods,no matter how much i eat my weight never changes from 8 stone it always stays the same,i am very skinny and very unhappy with my size,so unhappy i wont even where a tea shirt in the summer,i will wear several layers of cloths coz i am so ashamed of the way i look,i have already had tests to see if i have got an over active thyroid and that came back as been negative. im realy in some desperate need of some help or at least some advise,please could you help me ?