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Does Soy foods Affect Tongkat Ali?
May affect absorption or how you feel
The short answer
Soy isoflavones have mild anti-androgenic effects via estrogen receptor activation, which may partially counteract tongkat ali's testosterone-supporting benefits.
How to arrange timing
Separate tongkat ali from soy-heavy meals by at least 2 hours for best effect.
Reference
Reference noted for this food and supplement combination: Examine.com; Talbott et al., JISSN 2013
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.