Does High-fiber foods Affect Iodine?

May affect absorption or how you feel

The short answer

Certain high-fiber foods (especially soy fiber and cruciferous vegetable fiber) contain goitrogens that interfere with iodine utilization.

How to arrange timing

Separate iodine supplements from high-fiber meals, especially soy and cruciferous vegetables.

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.