Biotin Now

The FDA has warned that high biotin doses can interfere with critical blood tests, including those for heart attacks (troponin), thyroid function, and pregnancy. User Experience Summary A Review of the Use of Biotin for Hair Loss - PMC

It is effective for treating rare biotinidase deficiencies or conditions like "uncombable hair syndrome". biotin

Most researchers conclude that the widespread use of biotin for general hair growth is not supported by robust clinical trials. The FDA has warned that high biotin doses