It is best for women to eat 10-20 blueberries a day. In 100 to 200 grams, children should be reduced in moderation, if it is 1 to 2 years old children eat 3 to 5 a day. Blueberries have antioxidant, vision protection, enhance immunity and other effects, pull coal antioxidant capacity is better, can remove free radicals in the body, with delayed aging. Blueberries also have anthocyanins, can make the eyes within the retinal cell regeneration and thus play a protective role in vision, blueberries within the sugar is relatively high, is not suitable for high blood sugar crowd use. Usually eat blueberries are beneficial, but blueberries are cold, there is a lot of sugar, every day can not eat a lot, if you eat a lot of words, may lead to gastrointestinal discomfort, elevated blood glucose, may affect the health, and there is a case of obesity, but eat blueberries also have certain benefits, it can make our skin better, effectively improve the skin problems.