Can You Take Riboflavin 5'-Phosphate and Zinc Together?

May affect absorption

The short answer

High-dose zinc may interfere with riboflavin 5'-phosphate (FMN) absorption by competing for intestinal transport, similar to its interaction with riboflavin. FMN must be dephosphorylated to riboflavin for absorption, making it subject to the same competitive dynamics.

How to arrange timing

Separate by 1-2 hours if taking high-dose zinc.

Reference

Reference noted for this combination: Examine.com; NIH ODS Riboflavin Fact Sheet 2024

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.