Can You Take Biotin and Vitamin C Together?

May affect absorption

The short answer

Vitamin C (ascorbic acid) also uses the SMVT transporter and may compete with biotin for intestinal absorption at high doses.

How to arrange timing

Space high-dose vitamin C and biotin at least 2 hours apart.

Reference

Reference noted for this combination: Examine.com

Important context

Whether supplements suit you together also depends on dose, product formulation, health conditions, and medication use. Ask a doctor or pharmacist first if you take medication, are pregnant or breastfeeding, or have a chronic condition.