A biotin deficiency occurs when the body doesn't get enough biotin (vitamin B7), a water-soluble vitamin that plays important roles in metabolism, cellular signaling, and gene regulation.

Biotin supports several important functions in the body, but do you need to take it as a supplement? Experts weigh in.

That said, true biotin deficiency is rare. Biotin is present in a wide variety of foods, so individuals with a fairly balanced diet are unlikely to experience a deficiency. People with biotin ...

Biotin deficiency is so rare that a severe deficiency has never been reported in a healthy adult eating a mixed diet. However, in cases of biotin deficiency, the symptoms can include ...

While rare, biotin deficiency can lead to symptoms such as thinning hair, skin rashes, brittle nails, fatigue and depression. “Biotin is [also] considered helpful for healthy skin, nails and ...

The pursuit of healthy, lustrous hair has become a near-universal goal, driving millions to experiment with biotin supplements in hopes of unlocking the secret to stronger, shinier strands.

“That’s actually why I don’t typically recommend biotin supplements unless there’s a proven deficiency.” Biotin can help support healthy skin, hair and nails, both of our experts tell ...