catechins
2 interactions related to catechins
green tea + iron
Green tea catechins, especially epigallocatechin-3-gallate (EGCG), chelate non-heme iron in the gut and form insoluble complexes that reduce intestinal absorption. The effect is dose-related and most pronounced when tea is consumed with iron-containing meals or supplements.
green teaironegcgcatechinsabsorptionnon-heme ironanemiapolyphenols
oolong tea + iron
Oolong tea sits between green and black tea in polyphenol oxidation and contains substantial tannins and catechins that bind non-heme iron in the gut to form insoluble iron-polyphenol complexes. Drinking oolong tea with meals reduces absorption of dietary and supplemental non-heme iron.
oolong teairontanninspolyphenolsabsorptionnon-heme ironanemiacatechins