Green tea extract is an active ingredient extracted from green tea leaves, mainly including tea polyphenols (catechins), caffeine, aromatic oil, water, minerals, pigments, carbohydrates, proteins, amino acids, vitamins, etc. Green Tea Polyphenols (GTP) are the main components of green tea and account for about 30% of dry matter. GTP is extracted from tea leaves and their by-products (tea powder, tea flakes, coarse tea or pruned leaves). Tea polyphenols have the effects of anti-oxidation and scavenging free radicals, significantly reducing the contents of serum total cholesterol, triglycerides and low density lipoprotein cholesterol in hyperlipidemia, and restoring and protecting vascular endothelial function. The lipid-lowering effect of tea polyphenols is also one of the main reasons why tea can make obese people lose weight and not rebound.