Flavonoid composition of orange peel and its association with antioxidant and anti-inflammatory activities

Dried citrus peel derived from Citrus reticulata, also called “chenpi”, possesses a complex mixture of flavonoids and has a history of traditional use to treat a variety of digestive disorders. We compared three sources of conventional chenpi from California (USA), Guangxi, Zhejiang, and two sources of “nchenpi”, which contain greater nobiletin content, from Sichuan and Xinhui (China). Xinhui orange peel extract (OPE) had highest content of...