I just saw my doctor for low BMI yesterday. I've got blood work to do today. I've had the same struggle my whole life. I barely weighed 90 lbs in high school and was often called anorexic. I fluctuate in weight from 112-121, it's never consistent month to month. Sometimes I gain and sometimes I don't.
I hope you're able to put on weight in a healthy manner. I know the difficulty; trust me I do.
last relaxer; 082708, BC; 081810, CG; 122410
high porosity, med/coarse texture, high density, color treated