Catechin is present in many dietary products, plants, fruits (such as apples, blueberries, gooseberries, grape seeds, kiwi, strawberries), green tea, red wine, beer, cacao liquor, chocolate, cocoa, etc. 

Catechins are a type of phenolic compound present in many dietary products, plants, fruits such as tea, cocoa, and berries that have antioxidant activity. Tea and red wine are some of the most popular beverages that contain a significant amount of catechin.

It has many beneficial properties for human health, such as anticancer, anti-obesity, antidiabetic, anti cardiovascular, anti-infectious, and neuroprotective effects(Isemura M., 2019).