1. Enhance immunity: Grapes are rich in vitamin C and antioxidants, which can improve the body's immunity, prevent infectious diseases and anti-aging.

2. Protect the heart: polyphenol compounds in grapes have a protective effect on the cardiovascular system, which can lower blood pressure, inhibit platelet aggregation and prevent heart disease and stroke.

3. Anti-cancer: polyphenol compounds in grapes have a strong antioxidant effect, which can prevent and control cancer caused by oxidative damage.

4. Promote intestinal health: The fiber in grapes can help intestinal peristalsis, promote digestion and excretion, and prevent constipation and colon cancer.

5. Lower blood sugar: polyphenol compounds in grapes can promote insulin secretion, which helps lower blood sugar and prevent diabetes.

Grape contraindications:

1. Grapes contain acidic substances, excessive consumption can easily lead to gastrointestinal problems such as mouth ulcers and gastritis.

2. Grapes contain natural fructose, diabetics and obese people should pay attention to moderate consumption.

3. Grapes contain a certain amount of alcohol, people with liver disease should eat with caution.

4. The seeds and skins of grapes contain oxalic acid, which should not be consumed at the same time with calcium-rich foods to avoid affecting calcium absorption.