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Medical and Pharmacy Editor:

Brand Name: Coenzyme R, Vitamin H, Nail-ex, Appearex

Generic Name: biotin

Drug Class: B vitamins

What Is Biotin and How Does It Work?

Biotin is a vitamin B supplement. It occurs naturally in food such as liver, legumes, tomatoes, soybeans, and carrots.

B vitamin is a member of the water-soluble vitamin family, and contributes to several naturally occurring reactions in the body between various enzymes or carboxylases.

While biotin deficiency is extremely rare, it may cause dermatitis, brittle fingernails, diabetes, hair loss (alopecia), and perosis. Biotin is necessary for healthy skin, nails, and hair.

Biotin is available under the following different brand names: coenzyme R, vitamin H, Nail-ex, and Appearex.

Dosages of Biotin Should Be Given As Follows:


  • 30 mcg per day
  • 35 mcg per day, if lactating. (See “Pregnancy and Lactation” section)


  • 5-6 mcg per day, infants (0-1 year old)
  • 8-12 mg per day, children (1-9 years old)
  • 20-25 mcg per day, adolescents (9-18 years old)

Dosage Considerations

There are no dosage considertaions for biotin.

What Are Side Effects Associated with Using Biotin?

Biotin is generally safe with no documented adverse effects.

Medically Reviewed by a Doctor on 4/14/2017

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