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Biotin

By Cathy Wong, About.com

Updated: February 6, 2008

About.com Health's Disease and Condition content is reviewed by our Medical Review Board

What is Biotin?

Biotin is a B vitamin that's needed for the formation of fatty acids and glucose, which are essential for the production of energy. It also helps with the metabolism of carbohydrates, fats and proteins.

Biotin is found naturally in food. Good dietary sources of biotin include brewer's yeast, nutritional yeast, liver, cauliflower, salmon, bananas, carrots, egg yolks, sardines, legumes and mushrooms.

Biotin deficiency isn't common, unless you frequently eat a lot of raw egg white, which contains a protein that blocks the absorption of biotin. Genetic disorder of biotin deficiency, infant seborrheic dermatitis, surgical removal of the stomach, and excessive alcohol consumption may increase a person's requirement for biotin.

Biotin deficiency may lead to skin rash, hair loss, high cholesterol and heart problems.

Why Do People Use Biotin?

There is little solid evidence that biotin supplements are effective for acne, eczema, brittle nails, diaper rash, cradle cap or hair loss.

Side Effects and Safety Concerns

The safety of biotin supplements in pregnant or nursing women, children or people with liver or kidney disease isn't known.

People with a history of seizures shouldn't use biotin unless under the supervision of a qualified health practitioner.

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