Asahi Oda

1 Introduction Polyphenols are naturally occurring plant secondary metabolites and pigmented components found in most plants, and more than 5000 compounds have been identified. Polyphenols have been reported to ameliorate arteriosclerosis, diabetes and obesity (Fraga et al. 2019; Di Lorenzo et al. 2021; Wan and Co 2021; Rana et al. 2022). The effects of polyphenol-rich foods on humans, rodents and livestock have been previously investigated in Hashem et al. (2020), Serra et al. (2021) and Beslo et al.