No, unlikely to help
Biotin deficiency is rare, but can occur in persons with genetic mutations, on long-term antibiotics or anti-convulsants, or who eat a lot of raw egg whites.
There is no good evidence that this over-the-counter supplement is the magic potion to thicken hair, grow hair, or prevent hair loss
. Biotin is safe to take in the usual amounts, but not in the huge doses that some websites are suggesting.