Answer first
Biotin is a B vitamin. A review found that reports of hair improvement were mostly in people with a biotin deficiency or certain conditions; true deficiency is uncommon. High-dose biotin can also interfere with some blood tests, so tell your doctor or lab before tests.
Deficiency
Can occur with some medicines, genetic conditions or very restricted diets.
Lab tests
Biotin can distort thyroid and heart test results. Mention it before blood tests.
Questions
Is there biotin in Folli-Activ?
Yes, as one of 10 ingredients.
Should I stop before a blood test?
Ask your doctor; many advise pausing for a few days.
Studies mentioned
These studies looked at ingredients or general approaches. None of them tested our treatments or products, so they are background, not proof.
- Patel DP et al. (2017). A Review of the Use of Biotin for Hair Loss. Skin Appendage Disord 3(3):166-169.Systematic review of cases. All reported cases of biotin benefit for hair or nails involved an underlying deficiency or disorder; evidence for supplementation in healthy individuals is lacking.PubMed 28879195doi:10.1159/000462981