Blueberries used to be not a common fruit in our country, so Chinese people don’t know much about blueberries. In fact, blueberry is a wonderful fruit. Some parts of the northeast part of our country are also native to it, but the better blueberry varieties on the market now are more native to North America. Blueberries are called blueberries because they are rich in anthocyanins, which gives them a “unique” blue color and their appearance is easy to forget. As an oncologist, the most important reason for recommending it today is that in the past, it was not easy for us to eat it in spring, so it was easy to ignore this fruit. But now with the improvement of agricultural level, the southern region of China, especially Yunnan, has become the source of blueberry cultivation, and it also makes blueberry become the seasonal fruit in spring. So as an excellent fruit, I would like to introduce it especially today. Blueberries have been researched and found to have very good antioxidant capacity, which can reduce the damage of free radicals to the nervous system, so one of its promotional highlights is mainly its ability to enhance memory. But in fact, the strength of antioxidant ability is also related to the prevention of tumor. Blueberries are one of the strongest antioxidants among all fruits because of their richness in: anthocyanins, catechins, quercetin, kaempferol and other flavonoids ellagitannins and ellagic acid rosmarinic acid and resveratrol In addition, blueberries are rich in vitamin C, vitamin K, manganese and other trace elements, as well as dietary fiber. All these are quite beneficial to tumor patients or subhealthy people for tumor prevention. Anti-cancer power level 1: colorectal cancer Anti-cancer power level 2: oropharyngeal cancer, laryngeal cancer, lung cancer (Note: Anti-cancer power level 1 means: there is strong evidence to support its anti-cancer effect. Anti-cancer power level 2 means: may have a preventive effect on these cancers.) Blueberries are also recommended by the American Institute for Cancer Research as an anti-tumor food. In addition, we would like to add that, considering that blueberries may not be available in spring in many areas, other types of berries can be substituted. Generally speaking, the one that is available in spring in our country is strawberry, which is rich in ellagic acid. In laboratory in vitro cytology studies, this phytochemical showed some inhibitory effects on skin, bladder, lung, esophageal and breast cancer cells. Studies have shown that ellagic acid appears to possess several different anti-cancer mechanisms at the same time: it has a degree of antioxidant effect, helps to excrete specific carcinogens, and helps to slow down the proliferation of cancer cells. In addition strawberries contain a variety of flavonoids, all of which help to reduce the risk of cancer. The only thing that is unfortunate about strawberries is that they do not have as many anthocyanins as blueberries, so their antioxidant power may not be as strong as that of blueberries, but considering that they are relatively inexpensive and more readily available, it can be extremely helpful to eat more of them in the spring.