It is not necessary. Although modern medicine proves that many foods have good anti-cancer effects, such as asparagus, garlic, tomatoes, silver fungus, black fungus, kiwi, jujube, coix seeds, mulberry, grapes, etc. have the effect of regulating human immunity, thus playing an anti-cancer role. Many patients are so eager to cure their diseases that they blindly consume a large amount of these so-called anti-cancer foods, even daily, in a vain attempt to achieve the purpose of controlling or even curing tumors, but this will cause dietary bias and nutritional imbalance, which is not conducive to the recovery of tumor patients. Chinese medicine emphasizes on food identification, and various foods have their different tastes. Patients should choose anti-cancer foods according to their different conditions in order to achieve good results, otherwise it may have the opposite effect. For example, garlic is pungent and warm, so patients with hot constitution should not eat more of it; red dates are sweet and warm, so patients with damp heat should not eat more of them, as sweet can fill the middle and warm can help heat, so eating more of them will aggravate the disease.