 [ Symptoms ] i am dieting to lose weight and my hair is falling out could my diet be causing my hair loss [ Disease ] whether or not your hair loss is related depends on how rapidly you are losing weight if you are crash dieting or using a fad diet for rapid weight loss you may indeed have a caloric deficiency which is translating to hair loss i recommend that you lose the weight slowly and in a controlled fashion 1 pound per week and be sure to maintain good nutrition while you are dieting