Supplement interaction
These two supplements may interact. Here's what you need to know before taking them together.
Green tea catechins (especially EGCG) bind to non-heme iron and form insoluble complexes that your body cannot absorb. A single cup of green tea can reduce iron absorption by 60-70%. Green tea extract concentrates this effect.
Take Iron and Green Tea Extract at completely different times of day. Iron in the morning on an empty stomach with Vitamin C. Green Tea Extract in the afternoon, at least 2 hours after any iron-containing meal.
Quick facts
Green tea's polyphenols, particularly epigallocatechin gallate (EGCG), are potent iron chelators. They bind to non-heme iron in the digestive tract and form complexes that pass through your system without being absorbed.
This is one of the most significant supplement interactions by magnitude. A single serving of green tea can block 60-70% of iron absorption from that meal. Green tea extract supplements, which concentrate these polyphenols, have an even stronger effect.
The rule is simple: never take iron and green tea together. Take iron first thing in the morning with Vitamin C and no tea or coffee. Wait at least 2 hours before consuming any green tea or green tea extract.
An afternoon green tea extract supplement works well — it provides the antioxidant and metabolic benefits without interfering with morning iron absorption.
Can I take Iron and Green Tea Extract together?
No — green tea extract dramatically blocks iron absorption. Take them at completely different times of day, separated by at least 3 hours.
What happens if I take Iron and Green Tea Extract at the same time?
Green tea catechins bind to iron and prevent absorption. You could lose 60-70% of your iron dose. This is one of the most impactful supplement interactions.
How far apart should I take Iron and Green Tea Extract?
At least 3 hours. Iron in the morning on an empty stomach, green tea extract in the afternoon.
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