Does Alcohol Affect Vitamin B12?

Amount or timing may matter

The short answer

Alcohol damages gastric mucosa and reduces intrinsic factor needed for B12 absorption.

How to arrange timing

Separate B12 from alcohol by at least 4 hours.

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.