Green tea catechins (EGCG) significantly reduce non-heme iron absorption.
EGCG chelates non-heme iron in the gut, making it unavailable for absorption. Can reduce iron absorption by 25-60%.
Separate green tea extract and iron supplements by at least 2 hours. Take iron on an empty stomach with vitamin C.
Take green tea extract and iron supplements at least 2 hours apart.
EGCG in green tea extract chelates iron and reduces absorption by up to 60%. Additionally, very high-dose EGCG on an empty stomach may stress the liver.
Always separate green tea extract from iron by at least 2 hours. Take green tea extract with food to reduce liver stress.
Known drug category interactions for these supplements. Especially relevant if you take prescription medications.
Iron reduces levothyroxine absorption.
Take levothyroxine at least 4 hours before or after iron supplements.
Reference values for safe daily intake of these supplements.
GI distress above UL. Risk of iron overload in people with hemochromatosis.