What does biotin do?
Where is biotin found?
Biotin has been used in connection with the following conditions
Who is likely to be deficient of biotin?
Certain rare inborn diseases can leave people with depletion of biotin due to the inability to metabolize the vitamin normally. A dietary deficiency of biotin, however, is quite uncommon, even in those consuming a diet low in this B vitamin. Nonetheless, if someone eats large quantities of raw egg whites, a biotin deficiency can develop, because a protein in the raw egg white inhibits the absorption of biotin. Cooked eggs do not present this problem. Long-term antibiotic use can interfere with biotin production in the intestine and increase the risk of deficiency symptoms, such as dermatitis, depression, hair loss,2 anemia, and nausea. Long-term use of anti-seizure medications may also lead to biotin deficiency.3Alcoholics, people with inflammatory bowel disease, and those with diseases of the stomach have been reported to show evidence of poor biotin status. However, the usefulness of biotin supplementation for these people remains unclear.4 In animals, and possibly in humans, biotin deficiency can cause birth defects.5 As biotin deficiency may occur in as many as 50% of pregnant women,6 it seems reasonable to use a prenatal multiple vitamin and mineral formula that contains biotin.
How much biotin is usually taken?
Are there any side effects or interactions with biotin?
Biotin works with some other B vitamins, such as folic acid, pantothenic acid (vitamin B5), and vitamin B12. However, no solid evidence indicates that people supplementing with biotin also need to take these other vitamins. Symptoms of pantothenic acid or zinc deficiency have been reported to be lessened with biotin,11 though people with these deficiencies should supplement with the nutrients in which they are deficient. Researchers have speculated that biotin and alpha lipoic acid may compete with each other for absorption or uptake into cells; but little is known about the importance of these interactions in humans.12
There is one report of a 76-year-old woman who developed a life-threatening condition (eosinophilic pleuropericardial effusion) while taking 10 mg of biotin per day and 300 mg of pantothenic acid per day.13 However, it is not clear whether the vitamins caused the problem.
Are there any drug interactions?