Advance on the absorption, metabolism, and efficacy exertion of quercetin and its important derivatives
2020
Yu Hai | Yuanxiao Zhang | Yingzhi Liang | Xiaoyu Ma | Xiao Qi | Jianbo Xiao | Weiming Xue | Yane Luo | Tianli Yue
Abstract Quercetin, a dietary flavonol, has been used as potential ingredient in food supplements to promote health. Its health effects are closely related to its bioavailability and further depend on its absorption, metabolism and excretionin vivo. Here, we systematically summarized the absorption and metabolism of quercetin in human intestine, liver, and kidney, highlighting the transport and metabolic pathways, intermediate metabolites, and circulation channels involving quercetin. The bioactivities of quercetin on theintestine, liver, and kidney were also considered. In general, except for passive diffusion, different transporters (e.g., SGLT1,OATPs, and MRPs) participate in the transport of quercetin and its metabolites across biological barriers. Quercetin undergoes phase II metabolism after absorption by the intestine and is finally excreted into bile through liver or urine through kidney. Quercetin can protect the intestinal barrier and modulate the microflora. Moreover, its antioxidant, anti‐inflammatory, and anti‐fibrotic activities protect the liver and kidney.
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