![]() The diagnoses of the type of hair conditions varied or were not cited at all.A handful of case reports and small trials have shown a benefit, but the study designs had weaknesses: Although a deficiency of biotin can certainly lead to hair loss and skin or nail problems, evidence showing a benefit of supplementation is inconclusive. Vitamin B7 and Healthīiotin supplements are often glamorized as a treatment for hair loss and to promote healthy hair, skin, and nails. There is no UL for biotin due to a lack of reports showing negative effects from very high intakes. UL: A Tolerable Upper Intake Level (UL) is the maximum daily dose unlikely to cause adverse side effects in the general population. ![]() Lactating women need 35 micrograms daily. Instead, there is an AI (Adequate Intake) level, which is assumed to ensure nutritional adequacy.ĪI: The AI for biotin for men and women 19 years and older and for pregnant women is 30 micrograms daily. Recommended AmountsĪn RDA (Recommended Dietary Allowance) does not exist for biotin because there is not enough evidence to suggest a daily amount needed by most healthy people. It also helps to regulate signals sent by cells and the activity of genes. Biotin plays a vital role in assisting enzymes to break down fats, carbohydrates, and proteins in food. It is a water-soluble B vitamin found naturally in some foods and also in supplements. You may recognize vitamin B7 by its popular name of biotin.
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