Vertebrae and Collar Bones

22 year old, 5'6" art student, in need of major weight loss after weight gain as a medical side effect.

Currently: 150 lbs
Goal 1: 130 lbs
Goal 2:120 lbs
Ideal dream weight: 110-115 lbs

I want to be clear that I don't want to be anorexic, i just want to be healthier.this is not a pro-ana blog.