Blueberries are called the king of berries and have high nutritional value. Blueberries are rich in amino acids, sugars, vitamins, minerals and dietary fiber, especially anthocyanins and flavonoids. The main functions of blueberries are almost all related to anthocyanins and flavonoids, as follows:

1, anti-oxidation: Blueberries have very strong anti-oxidation ability, which can remove excess free radicals in the body and delay aging;

2. Protect eyesight: Because anthocyanins rich in blueberries can promote the regeneration of rhodopsin in retinal cells, thus protecting eyesight;

3, increase immunity: Blueberries are rich in anthocyanins and flavonoids, which have antioxidant effects. Potassium in blueberry can ensure the balance of electrolyte and increase the transformation of lymphocytes, thus improving the immunity of the body; Blueberries are good, but they are not suitable for people to eat. Blueberries are high in sugar and belong to high glycemic index food. Diabetic patients should not overeat. If they need to eat, it is suggested that blueberries weighing less than 200g per meal are more suitable between meals. Because of the high potassium content in blueberries, it is not recommended for patients with kidney disease to eat too much blueberries.