Matcha Interactions

1 documented interaction — 1 warning, 0 beneficial pairs.

View the full Matcha supplement guide →

Interaction warnings

Matcha + warfarin

moderate

Matcha is powdered whole green tea leaf, so each serving delivers far more vitamin K than a normal brewed cup. Vitamin K is the cofactor warfarin antagonises, so large or fluctuating matcha intake can lower INR and reduce the anticoagulant effect, similar to the documented green tea-warfarin case report.

Related ingredients

Ingredients commonly checked alongside Matcha.

Warfarin(1)
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Matcha Interactions | Pilora