Several long-term studies have shown that girls who diet in their early teenage years are three times more likely to become overweight five years later, even if they started at a normal weight, and all of these studies found that the same factors that predicted weight gain also predicted the development of eating disorders.
Flere langtidsstudier har vist, at piger, der er på kur i deres tidlige teenage-år forøger deres chancer for at  bliver overvægtige tre gange fem år senere, selvom de startede med en normal vægt, og alle disse studier fandt, at de samme faktorer der forudsagde en vægtforøgelse også forudsagde udviklingen  af spiseforstyrrelser.