Puritan’s Pride, GNC and Amazon.com all offer biotin supplements for retail sale as of 2015. Potency ranges from 300 to 10,000 micrograms per dose for tablets, soft-gels and capsules, and other biotin-enriched products are available for purchase, including microlozenges, sprays, chewables and melts.
Biotin is a B vitamin and coenzyme that is sometimes referred to as Vitamin H, notes WebMD. It is usually recommended as a supplement for conditions such as brittle nails and diabetes, since it supports optimal health of the nerves, skin, metabolism, cells and digestive tract. It may also help to treat certain types of peripheral neuropathy that sometimes occur with diseases such as diabetes and kidney failure.
Early research indicates that supplementing the diet with biotin along with chromium may improve blood sugar levels. Biotin by itself may decrease symptoms of neuropathy associated with type 2 diabetes, according to WebMD. Biotin supplementation may also decrease insulin resistance in diabetics.
As of 2015, some studies that show that biotin is promising for treating brittle nails. However, claims that biotin treats conditions such as depression, hair loss, hepatitis and cradles cap are unsupported, cautions WebMD. Biotin deficiency is uncommon, since biotin is present in foods that most people naturally consume.