← Back to food and supplement guidance
Does High-fiber foods Affect Vitamin D3?
May affect absorption or how you feel
The short answer
High fiber reduces fat absorption in the gut. Since vitamin D is fat-soluble, this reduces its bioavailability.
How to arrange timing
Take vitamin D with a low-fiber meal containing healthy fats, at least 2 hours from high-fiber foods.
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.