1. Weight loss: Winter melon and hawthorn contain a large amount of dietary fiber and acidic substances, which can promote body metabolism, accelerate fat burning, and help lose weight.

2. Detoxification and beauty: Lemon is rich in vitamin C and citric acid, which can eliminate toxins from the body, purify the body, and improve the gloss and elasticity of the skin.

3. Regulate digestion: Both lotus leaves and hawthorn have the effects of clearing heat, detoxifying, cooling blood and stopping bleeding. They can relieve gastrointestinal discomfort, hyperacidity and other problems by regulating the digestive system.

4. Remove bad breath: The acidic substances in lemon and hawthorn can effectively remove oral odor and bad breath problems.

5. Reduce blood lipids: Hawthorn contains a large amount of flavonoids, which can reduce blood lipids, blood pressure, blood sugar and other indicators, and has a certain effect on preventing cardiovascular diseases.

In short, lemon, hawthorn, winter melon and lotus leaf tea has a variety of effects and can be combined with different ingredients to produce different effects and tastes. But be careful about the amount you drink, because ingredients such as lemon and hawthorn are highly acidic, and excessive drinking will have adverse effects on your teeth and stomach.