Does Dairy Affect Vitamin B12?

May affect absorption or how you feel

The short answer

High dairy intake may reduce B12 supplement absorption due to calcium competition.

How to arrange timing

Separate B12 from large dairy servings by 1 hour.

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.