Does Alcohol Affect Vitamin B2?

Amount or timing may matter

The short answer

Alcohol impairs riboflavin absorption and increases its urinary excretion.

How to arrange timing

Take vitamin B2 at least 4 hours from alcohol.

Reference

Reference noted for this food and supplement combination: NIH ODS 2024

Important context

The effect can also change with food amount, supplement 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.