Biotin is just one of the vitamins found in B-complex vitamins. The University of Maryland Medical Center states that B-complex vitamins help your body metabolize protein and fats. B-complex vitamins are imperative in maintaining skin, hair, eyes and your liver. The UMMC states that B-complex vitamins assist with the function of your nervous system as well.
Hair Growth
Biotin is responsible for the growth of your skin, hair and fingernails. The University of Maryland Medical Center states that even though biotin is water-soluble, traces are stored in your intestines and biotin deficiency is rare. Water-soluble means your body does not store the vitamin for later use. Symptoms of biotin deficiency include hair loss, hair splitting and dry, scaly skin. Dry, scaly skin can cause flakes to develop on your scalp, which biotin can help prevent. Flakes of excess skin can cause hair follicles to become clogged, which can impede hair growth.
Hair Strength
Brittle hair can break easily and fall out. Biotin is crucial for strengthening your hair and fingernails, according to the University of Maryland Medical Center. Biotin helps your body metabolize amino acids, which are the building blocks of protein. Hair is primarily composed of protein, which is why biotin and amino acids are so important for hair strength.
The University of Maryland Medical Center reports that certain cosmetics containing biotin are sold over-the-counter to encourage hair and nail growth. Shampoos containing biotin promote hair growth by increasing circulation to your scalp. The increased circulation to your scalp helps deliver essential nutrients and vitamins.
Hair Disorders
The University of Maryland Medical Center suggests using Biotin to treat different hair disorders such as hair loss and infant cradle cap. UMMC also states that biotin can treat thinning and splitting hair as well as dry skin, and that children and adults who suffer from hair loss can benefit from biotin, as it promotes hair growth. Preliminary studies conducted by the medical center suggest that biotin can improve the condition of cradle cap, which is similar to dandruff but occurs in infants instead of adults. MedlinePlus states that biotin may theoretically treat "uncombable hair syndrome" but as of 2010, there was not enough scientific evidence to either prove or disprove this claim.
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