Biotin and Finasteride

Supplement–drug interaction evidence from the TruthStack database.

SeverityINFO
Evidence TierModerate
Interaction TypeCOMPLEMENTARY
Last Reviewed2026-02-24

Summary

No direct pharmacological interaction. Biotin supports hair keratin production through a different mechanism than finasteride (DHT reduction). Note: high-dose biotin can interfere with laboratory immunoassays.

CYP Enzyme Profiles

Published CYP enzyme data for compounds in this interaction:

Finasteride: CYP3A4 substrate (moderate)

API Reference

GET https://api.truthstack.co/v1/check?c1=Biotin&c2=Finasteride

Open, unauthenticated. Returns JSON. Developer documentation

Related Interactions

Amlodipine + Biotin Atorvastatin + Biotin Biotin + Citalopram Biotin + Cyclosporine Biotin + Duloxetine Biotin + Escitalopram Biotin + Fluoxetine Biotin + Lansoprazole
What this page is and is not. TruthStack is an informational reference database that describes published pharmacological findings. It does not provide medical advice, diagnosis, or treatment recommendations. The information on this page reflects flags in our database and should not replace consultation with a qualified healthcare provider. Always discuss supplement-drug combinations with your prescriber or pharmacist.