Ok, so im 15, female, 5' 7" and about 105lbs. Is this normal? My entire life i've had an issue gaining weight, and ive tried a bunch of different diet plans..and now am on nutritional shakes. What are these supposed to do for me? If i do, where will i gain the weight? Are there any other foods that i can eat, without getting sick that will make my body grow the way its supposed to? Also, i don't do any exercising at all. Unless im in gym class. And on weekdays i get around 6 hours of sleep, weekends anywhere from 7-13 hours. Any changes i should make to anything in my life so i can be healthier?