Can crash dieting cause hair to fall out?
Yes, crash dieting can contribute to hair loss. Rapid calorie restriction can place physiological stress on the body, which may trigger telogen effluvium, a condition where hair follicles enter the shedding phase earlier than usual. Hair loss typically begins around 2 to 3 months after the period of weight loss and is usually temporary, with regrowth occurring over several months once nutritional intake improves.
Key points:
- Crash dieting may lead to hair loss due to reduced calorie intake, insufficient protein, and low levels of essential nutrients such as iron.
- Hair shedding occurs because the body prioritises essential functions over hair growth during periods of nutritional stress.
- Hair loss following crash dieting is usually reversible once a balanced diet is restored, although repeated or prolonged restriction may contribute to ongoing thinning.
- Restrictive diets that exclude major food groups may increase the risk of hair loss through nutrient deficiencies and physiological stress.
This text has been fact-checked for accuracy by Sorin Romaniuc, Pharmacist at medino.