Horse shampoo became popular due to its supposed properties for strengthening hair, adding shine, and preventing hair loss. This concentrated product is formulated with biotin, also known as vitamin H, B7, or B8.
“"Shampoos are well-studied cosmetics used to wash hair and can improve its cosmetic conditions, but they are in no way effective against hair loss or its prevention."
Dr. José Carlos Moreno, Head of Dermatology at Reina Sofía Hospital in Córdoba and former president of the Spanish Academy of Dermatology and Venereology (AEDV), emphasizes that biotin is a B-group vitamin that may only be effective for some types of alopecia if it is ingested, as it is not absorbed topically.
There is very little scientific evidence to support claims that biotin supplements improve hair, skin, and nails.
Biotin deficiency is relatively rare and the vitamin is mainly found in foods such as liver, egg yolk, mushrooms, and certain fruits. The National Institutes of Health (NIH) insists that the hype surrounding horse shampoo “lacks scientific rigor.”
