Black rice will lose color after soaking.

Black rice, in fact, only the waxy layer on its surface is black. After the waxy layer is peeled off, it looks like ordinary white rice. The nutritional value of black rice mainly lies in this waxy layer, which is on the surface. The shell contains water-soluble melanin, so it is normal for the water used to wash black rice to change color.

Black rice detection method:

White vinegar detection method

Take some rice grains, place them one at a time, drop white vinegar on them respectively, wait for a few seconds If a red color appears within minutes (similar to the color of red wine, the red color of red wine is the result of the reaction between anthocyanins and acid), it is good rice. If you dye the rice, the color will come out immediately after you drop the dye.

Sample as much as possible, because there is a mixture of dyed rice and black rice on the market today. If there is no reaction, it means that the anthocyanins have been extracted from black rice. This behavior is even worse, because the most beneficial nutrition of black rice is the ultra-high anthocyanin content.

Extended information:

1. Anti-aging and preventing arteriosclerosis

The outer layer of black rice contains anthocyanin pigments, which itself has many Strong anti-aging effect. Domestic and foreign studies have shown that the darker the color of rice, the stronger the anti-aging effect of epidermal pigments. The effect of black rice pigments is the strongest among rice of various colors. In addition, this pigment is also rich in flavonoid active substances, which is five times more than white rice, and has a great effect on preventing arteriosclerosis.

2. Health care

Black rice has health care effects and is suitable for chronic patients, convalescent patients and young children. It has a good nourishing effect and is also beneficial to the development of children's bones and brains. Promote the recovery of pregnant women and those who are infirm after illness.

3. Prolong life

Black rice can significantly increase the content of hemoglobin and hemoglobin in the human body, which is beneficial to the health of the cardiovascular system. Regular consumption of black rice can blacken hair, moisturize skin, and prolong life.

4. Improve anemia

Black rice is rich in iron. Eating black rice has a certain effect on alleviating and improving anemia. Modern research has also confirmed this: black rice has It has the effects of nourishing yin and nourishing the kidney, strengthening the spleen and warming the liver, improving eyesight and activating blood circulation.

5. Control blood pressure and reduce the risk of cardiovascular and cerebrovascular diseases

The potassium, magnesium and other minerals in black rice are also helpful in controlling blood pressure and reducing the risk of cardiovascular and cerebrovascular diseases. Therefore, patients with diabetes and cardiovascular disease can consume black rice as part of their dietary regimen.

People's Daily Online - Black rice turns black when soaked in water. Experts say: It is normal for natural grains to lose color