Malnutrition certainly does, and you know that most fats don't get that way by eating a truckload of rainbow fruits and veggies every day. Also, it looks like she may have colored hair (ends are a warm brown, roots are a cool brown), and that will also damage your hair and scalp over time, eventually leading to hair loss in extreme cases. My guess is shit diet plus a harsh "beauty" routine combine to make that look.