Olivaro@:- Green tea leaf extract contains plant compounds called catechins, including epigallocatechin gallate, commonly known as EGCG. Green tea compounds have been studied for antioxidant properties and several potential health effects. However, evidence of a meaningful blood sugar benefit is not conclusive. The safety of green tea extract also depends on its concentration and preparation. Some concentrated extracts have been associated with liver injury, making it important to review ingredient quantities and safety warnings.