Catechu catechu is a plant used to make tea and is commonly found in China and Japan. Its functions include:

1. Antioxidant: Catechu catechu is rich in polyphenolic compounds, which can effectively resist oxidation and protect cells from free radical damage.

2. Lower blood sugar: The polysaccharides in catechu have a blood sugar-lowering effect and can help control blood sugar levels in diabetic patients.

3. Reduce blood lipids: Catechu catechu also contains saponin compounds, which can lower blood lipids and prevent cardiovascular diseases.

4. Antibacterial and anti-inflammatory: The flavonoids in catechu have antibacterial and anti-inflammatory effects and can effectively prevent and treat infectious diseases.

5. Assist in weight loss: The tea polyphenols and caffeine in catechu can accelerate metabolism and promote the decomposition and burning of fat, thereby achieving the effect of weight loss.