Blueberry is cold and contains a lot of sugar, so it is not suitable to eat more, which can easily lead to gastrointestinal discomfort, high blood sugar and excessive sugar intake, which will affect health and cause obesity. It is most suitable for adults to eat about 5 grams a day, and it should not exceed 2 grams at most. Blueberries are rich in anthocyanins, which have a strong antioxidant effect. They can scavenge free radicals in the body, protect cardiovascular and cerebrovascular diseases, promote the metabolism of skin cells, beauty beauty, delay aging and prevent memory deterioration. Moreover, blueberries are rich in dietary fiber and low in calories, which can promote digestion, relax bowels and lose weight.