Absorption of dietary quercetin glycosides and quercetin in healthy ileostomy volunteers

PC Hollman, JH de Vries, SD van Leeuwen… - The American journal of …, 1995 - Elsevier
Quercetin is a dietary antioxidant that prevents oxidation of low-density lipoproteins in vitro.
Intake of quercetin was inversely associated with coronary heart disease mortality in elderly
Dutch men. However, the extent of absorption of quercetin in humans is unclear. The aim of
this study was to quantify absorption of various forms of quercetin. Nine healthy ileostomy
subjects were studied, to avoid losses caused by colonic bacteria. They followed a quercetin-
free diet for 12 d; on days 4, 8, and 12 they received a supplement of fried onions at …