(1) Parkinson’s disease is mostly seen in the elderly, combined with plant nerve dysfunction, reduced digestive function, gastrointestinal peristalsis, spasm, constipation and excessive skin oil secretion. The patient’s condition and dietary preferences should be taken into account, and attention should be paid to the structure of food ratios, the mix of side dishes, meat and vegetables and fancy varieties. Eat more fiber-rich and easily digestible foods, eat more fresh vegetables and fruits, drink more water, eat more foods containing tyramine such as melon seeds, almonds, sesame seeds, skim milk, etc. to promote the synthesis of dopamine in the brain, and control the intake of fat appropriately. (2) Protein diet should not be excessive. Blindly giving too much protein diet can reduce the efficacy of levodopa because the large amount of neutral amino acids produced in protein digestion can compete with levodopa to enter the brain and affect its efficacy. Therefore, the daily requirement of protein is 0.8-1.2g/kg body weight, and the supply of protein is ensured by giving eggs, milk, fish and meat in the diet. If there is fever, decubitus ulcer and other conditions, the supply of protein should be increased. (3) For people with mastication and swallowing dysfunction, it is appropriate to sit down when eating, and foods that are easy to chew, easy to swallow, high in nutrition and high in fiber should be chosen. Recall the swallowing steps before eating. Let them swallow the excess saliva in the mouth when eating, move the food around with the tongue when chewing, eat little at a time and eat slowly, drink water after eating and swallow the residual food to prevent aspiration pneumonia. (4) For patients with diabetes, a diabetic diet should be given; for patients with coronary heart disease and hypertension, a diet high in sugar and vitamins and moderate protein is appropriate, and the intake of animal fat and salt should be restricted. Nutrition plays a very important role in the health status of patients with Parkinson’s disease. Diet therapy is one of the adjunctive treatments for Parkinson’s disease, aiming to maintain better nutrition and physical condition of patients, and to achieve better results with medication by adjusting the diet. The diet of Parkinson’s disease patients has many of the same basic principles as that of the general population, but it needs to be adjusted appropriately according to their condition. A variety of foods, including cereals, vegetables and fruits, dairy or legumes, and meat, should be included in a day’s diet. Diversified food can meet the body’s needs for various nutrients, but also make the diet itself is rich in fun. In a relaxed environment and atmosphere to enjoy eating, let the diet as a life enjoyment. 1, eat more cereals and vegetables and fruits usually eat 300 to 500 grams of cereals every day, such as rice, noodles, grains and so on. From cereals can mainly get carbohydrates, protein, dietary fiber and vitamin B and other nutrients, and can get the energy required by the body. Carbohydrates usually do not affect the efficacy of levodopa. Eat about 300 grams of vegetables or melons and one to two medium-sized fruits every day, from which you can get vitamins A, B, C, a variety of minerals and dietary fiber. 2, often eat moderate amounts of milk and legumes Milk is rich in calcium. Calcium is an important element in the composition of the bone surface skeleton, so for elderly Parkinson’s disease patients who are prone to osteoporosis and fractures, drinking a glass of milk or yogurt every day is an excellent way to replenish the body with calcium. However, since the protein content of milk may have an effect on the efficacy of levodopa medication, it is recommended that drinking milk be scheduled at night before bedtime in order to avoid affecting the effectiveness of the medication during the day. In addition, eating tofu, dried tofu and other soy products can also be supplemented with calcium. 3.Limited meat intake Because some amino acid components in food protein can affect the effect of levodopa drugs entering the brain, protein intake should be limited. One egg contains the same amount of protein as 25 grams of lean meat. Meat can be distributed in the morning, evening or lunch and dinner, but for some patients, in order to make the daytime medicine more effective, you can also try to arrange protein-rich food only at dinner throughout the day. 4. Try not to eat fatty meat, non-vegetarian oil and animal offal Cook food with vegetable oil. Not eating fatty meat, meat and oil and animal offal can help prevent the adverse effects of excessive intake of saturated fat and cholesterol on the body. Excessive fat in the diet can also delay the absorption of levodopa medication and affect its effectiveness. Drink 6 to 8 glasses of water and beverages daily 5. Water is the best drink Adequate intake of water is beneficial to the body’s metabolism. Adequate water enables the body to excrete more urine, reducing the chance of bacterial infections in the bladder and urinary tract. Adequate water also softens and makes stools easy to pass, preventing constipation. Due to insufficient water intake and medication, some patients may experience dry mouth, thirst and dry eyes. You can try the method of drinking half a glass more water per day than the previous day and gradually increase the amount of water to 6-8 glasses per day.