> not a simple calorie intake vs calories burned formula People have lost weight that way. At 14 your body was in growing phase. Clearly fat does not come from

> not a simple calorie intake vs calories burned formula People have lost weight that way. At 14 your body was in growing phase. Clearly fat does not come from air. I gained weight last year and I know how it happened. What kind of food you eat (sugary packaged vs fruit veg meat) and lifestyle matters.