Anthocyanins in blueberries can promote the regeneration of rhodopsin in retinal cells, prevent severe myopia and retinal detachment, and improve vision. At the same time, anthocyanins have the ability to accelerate the regeneration of rhodopsin, which is an indispensable component to ensure good eyesight.

2, good for heart health

Blueberries contain a special substance that can help blood vessels dilate. When blood vessels dilate, the blood circulation will be smoother, so that not only the pressure of blood on the blood vessel wall will be gradually reduced, but also the chance of leaving impurities and garbage in our blood vessels will be reduced, thus effectively reducing the formation of thrombosis.

3. Improve sleep state

Blueberries contain a special substance that can enter cells and help protect cells from free radicals, which is beneficial to our health. This special substance in blueberries can also make the nerve part and the function of brain tissue more stable, so that the sleep state will naturally be better.

Step 4 prevent constipation

A cup of fresh blueberries contains four grams of dietary fiber, accounting for 14% of the daily requirement of human body. Dietary fiber can effectively promote intestinal peristalsis, prevent constipation, and help remove waste in the intestine, which has many benefits to the body.

Extended data

Blueberries are native to North America and East Asia, distributed in Korea, Japan, Mongolia, Russia, Europe, North America, China, Heilongjiang, Inner Mongolia, Changbai Mountain in Jilin and other countries and regions, and grow at an altitude of 900 ~ 2300 m.

Blueberries are divided into two types: one is a dwarf shrub, short and wild, with small particles and rich anthocyanins; Secondly, artificially cultivated blueberries can grow to 240cm high, with large fruits and full pulp, which improves the edible taste of wild blueberries and enhances the absorption of anthocyanins by human body.

The size and color of blueberry fruit vary from species to species. Most varieties are dark blue or violet when they are ripe, such as rabbit-eye blueberry, high-bush blueberry and low-bush blueberry. A few varieties are red, and the fruits are spherical, oval, oblate or pear-shaped.

The ripening season of blueberries is from June to August. When the blueberry fruit is ripe, its surface is blue and black. Because blueberry fruits are not ripe consistently, they should be harvested in batches. Generally, it will be harvested in 2 ~ 3 days at full fruit stage 1 time, and harvested in 3 ~ 4 days at initial fruit stage and final fruit stage 1 time. Picking should be done after the dew dries in the morning, before the high temperature comes at noon, or after the temperature drops at night; It is not suitable for harvesting in rainy days, high temperature or when there is water on the fruit surface.

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