The principles of diet therapy for Parkinson’s disease patients nutrition plays a very important role in the health status of Parkinson’s disease patients. Diet therapy is one of the complementary treatments for Parkinson’s disease, aiming to maintain better nutrition and physical condition of the patient 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 also requires appropriate adjustments to the diet according to their condition. The following dietary principles are recommended for people with Parkinson’s disease: Eat a variety of foods and enjoy your meals. A variety of foods should be included in a day’s diet, including cereals, vegetables and fruits, dairy or legumes, and meat. Diversified food can meet the body’s needs for various nutrients, but also make the diet itself rich in fun. Enjoy your meals in a relaxed environment and atmosphere, and make eating an enjoyable part of your life. Eat more cereals and vegetables and fruits. Usually eat 300 to 500 grams of cereals, such as rice, noodles, grains, etc., every day. From cereals, you can mainly get nutrients such as carbohydrates, protein, dietary fiber and vitamin B, and get the energy your body needs. Carbohydrates usually do not affect the efficacy of levodopa. Eat about 300 grams of vegetables or melons and one to two medium-sized fruits per day. Get vitamins A, B, C, many minerals and dietary fiber from them. Eat dairy and legumes in moderation regularly. Milk is rich in calcium, an important element in the composition of bones, so for elderly Parkinson’s disease patients who are prone to osteoporosis and fractures, drinking 1 glass of milk or yogurt daily 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 to drink milk at night before going to bed in order to avoid affecting the effect of medication during the day. In addition, eating tofu, dried tofu and other soy products can also supplement calcium. According to research reports, fava beans (especially fava bean pods) contain natural levodopa, and adding fava beans to the diet of Parkinson’s disease patients can extend the release time of levodopa and methyldopa hydrazide combination drugs in patients from the usual 2 hours to 5 hours. This function of fava beans may be helpful in the treatment of Parkinson’s disease, but further experimental proof is needed. Eat limited amounts of meat. Protein intake needs to be limited because some amino acid components of food protein can interfere with the entry of levodopa drugs into the brain to work. One egg contains as much protein as 25 grams of lean meat. Meat can be distributed in the morning, evening, or lunch and dinner, but for some patients, it may be possible to try protein-rich foods only at dinner throughout the day to make the daytime medication more effective. Try not to eat fatty meat, non-vegetarian oils and animal offal cooking food with vegetable oil. Avoiding fatty meats, fatty oils and animal offal will help prevent the adverse effects of excessive saturated fat and cholesterol intake. 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 per day Water is the best drink. Adequate intake of water is beneficial to the body’s metabolism. Adequate hydration allows the body to pass more urine, reducing the chance of bacterial infections in the bladder and urinary tract. Adequate hydration also softens and makes stools easy to pass, preventing constipation from occurring. Due to insufficient water intake and medication, some patients may experience dry mouth, thirst and dry eyes. Try drinking half a glass more water per day than the previous day, and gradually increase the amount of water you drink to 6-8 glasses per day. Eat a meal half an hour after taking the drug. Usually a meal is taken half an hour after taking levodopa medication so that the medication can be better absorbed. However, for patients taking levodopa for the first time, they may experience nausea after taking the drug, so they can eat some low protein foods such as cookies, fruits or fruit juices while taking the drug, and drinking ginger juice also has the effect of relieving nausea and vomiting. In addition, some patients will have increased symptoms of involuntary movements after taking the drug, so you can take the drug during meals to reduce the symptoms by delaying the absorption of the drug. Diet therapy is individualized because patients’ conditions, physical tolerance and medication vary, so diet therapy needs to be individualized and adjusted accordingly as conditions change. If the patient has other diseases, the special dietary requirements of these diseases should be taken into account.