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. 2019 Feb 14;63:10.29219/fnr.v63.1518. doi: 10.29219/fnr.v63.1518

Fig. 1.

Fig. 1

The metabolic pathway of dietary polyphenols in humans. A small portion of polyphenols are directly absorbed by the small intestine. The majority of polyphenols (the insoluble and high molecular weight polyphenols) undergo extensive metabolism by gut microflora or tissues before being excreted, which represents at least 90–95% of the polyphenol intake.