Theaflavins, Thearubigins, and EGCG are a few of the Main antioxidants know as tea Polyphenols in oolong tea. It is actually responsible for many of the health benefits. A sour taste could indicate the tea leaves weren't processed effectively or the tea was over-steeped. However, some different types of https://www.goteaworld.com/what-does-oolong-tea-taste-like/