Effects on hair growth include acute telogen effluvium (TE), a well-known effect of sudden weight loss or decreased protein intake, as well as the diffuse alopecia seen in niacin deficiency. Nutritional deficiency may impact both hair structure and hair growth. While hair follicles are among the most metabolically active in the body, and hair growth may be impacted by calorie and protein malnutrition as well as micronutrient deficiency, the links are complex. The unregulated supplement industry also capitalizes on this population’s vulnerability. In fact, many will start dietary supplements without consultation in the hope that the supplements will help. Patients with hair loss often inquire whether nutritional supplements can help restore hair growth or prevent further hair loss.
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