Bacteria in the large intestine also produce biotin. A person will usually get enough biotin from these two sources. However, additional supplementation may be necessary during pregnancy or if a person has a biotin deficiency. Some people recommend biotin supplementation to aid hair growth.
However, there is no clinical evidence to support its use for this purpose. This article will discuss the impact that biotin has on hair growth. It will also look at recommended intakes, possible side effects, and the impact of deficiency. Anecdotal claims that biotin can aid hair growth are common, and its popularity among consumers is high. However, according to an analysis of available studies, there have not been any clinical trials to support the use of biotin supplementation to improve hair health, except in people born with deficiencies.
Although some studies have suggested links between biotin deficiencies and alopecia, further analysis has not found conclusive proof of benefit among healthy individuals. However, according to estimates, an intake of 30 micrograms mcg may be adequate. The average intake of biotin in Western countries, excluding the United States, is an estimated 35—70 mcg per day. It is rare for a person to have a biotin deficiency, and most people in the U. However, people with biotin deficiencies and those who are pregnant or breastfeeding may require biotin supplementation.
Healthcare professionals may prescribe a dosage of as little as 5 milligrams per day for a person with a biotin deficiency. However, the range of required supplementation may differ depending on individual circumstances. The FDA has warned that biotin might interfere with certain laboratory tests. The FDA reported an increase in adverse effects due to falsely high or low results.
A high concentration of biotin in samples can compromise diagnostic tests in which biotin is a key component. This may be the case for tests looking at troponin levels and thyroid function. According to an analysis , most biotin-related false results occur in thyroid disease-related tests.
The metabolic requirements of pregnancy may also lead to biotin deficiencies in some cases. Medical guidance has also suggested that genetic conditions affecting intestinal bacteria balances may result in biotin production deficiencies. Error Email field is required. Error Include a valid email address. To provide you with the most relevant and helpful information and to understand which information is beneficial, we may combine your e-mail and website usage information with other information we have about you.
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It depends. Research suggests that biotin can stimulate hair regrowth in people who have a clinical biotin deficiency.
There is no evidence to show biotin can improve hair growth in people without nutritional deficiencies. Yes, biotin can cause skin irritation and rashes in people who are sensitive to the B vitamin or other ingredients in the supplement. Taking too much biotin can also cause a skin rash. Topical biotin can irritate the skin. People with sensitive skin should do a patch test on their inner arm before applying biotin to a larger area. No, there is no evidence to suggest taking biotin supplements can lead to weight gain.
In fact, biotin is sometimes touted as a weight-loss supplement. However, there is no research to confirm biotin has any effect on weight. Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life. A review of the use of biotin for hair loss. Skin Appendage Disord. Biotin treatment mimicking Graves' disease. N Engl J Med. Updated March The golden egg: Nutritional value, bioactivities, and emerging benefits for human health.
Biotin deficiency enhances the inflammatory response of human dendritic cells. Am J Physiol Cell Physiol. Hair loss: Common causes and treatment. Am Fam Physician. Your Privacy Rights. To change or withdraw your consent choices for VerywellHealth.
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What to Look For. Recap Haircare products containing biotin may claim to treat brittle, thinning, or flat hair, but these claims are not supported by science.
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