Can You Take Calcium and Green Tea Extract (EGCG) Together?

May affect absorption

The short answer

EGCG (green tea catechins) may bind calcium and reduce its absorption through polyphenol-mineral chelation.

How to arrange timing

Consider separating green tea extract and calcium by 2 hours.

Reference

Reference noted for this combination: NatMed Pro Green Tea Monograph; Zijp IM et al., Crit Rev Food Sci Nutr 2000

Important context

Whether supplements suit you together also depends on 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.