There is no authoritative and specific recommended diet for osteoarthritis, but it is advocated that patients have a balanced and nutritious diet: 1. Avoid excessive calorie intake; 2. Advise patients to eat more fruits or vegetables, which are rich in antioxidants, such as apples, onions, strawberries, etc., which can help to reduce inflammation in the joints; 3. Advise to use olive oil in the selection of cooking oil, which can help to reduce the inflammation in the joints of the patients, and also avoid high-calorie foods such as barbecue or deep-frying.