You can eat animal protein to supplement nutrition, such as chicken, duck, beef, mutton and fish, among which fish is the best, rich in protein and relatively low in fat and cholesterol. If some cancer patients do not want to eat these meats, they can buy protein powder or milk powder outside to supplement protein. Besides that, you can eat plant protein, such as soy milk, soy milk, tofu and so on to supplement protein. In addition to protein, you should also eat green vegetables and fruits with high vitamin content. Generally, you can eat common green vegetables; fruits such as bananas, oranges, apples, dragon fruit, etc. These fruits are rich in vitamins and trace elements of potassium, and generally, cancer patients’ diet is poor, so they are encouraged to eat more green vegetables and fruits to supplement potassium.