Does Soy foods Affect Dong Quai?

Amount or timing may matter

The short answer

Dong quai has phytoestrogenic activity that may stack with soy isoflavones, increasing total estrogenic load.

How to arrange timing

Use caution combining dong quai with soy-heavy diets; monitor for estrogenic side effects.

Reference

Reference noted for this food and supplement combination: NIH NCCIH; Lau et al., Menopause 2002

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.