The Nutritional Value of Black Rice and Its Anti-Aging Effects
A general rule of food nutrition tells us that for the same food ingredient, the deeper the color, the higher its nutritional value, and rice is no exception. Therefore, the nutritional value of black rice is far higher than that of polished white rice. Compared to polished white rice, black rice contains about 4 times the amount of B vitamins; its levels of trace elements like potassium, magnesium, iron, zinc, and manganese are 4.4 times, 6 times, 1.7 times, 3.8 times, and 1.7 times higher, respectively; and its lysine content is 2 to 2.5 times greater.
The reason black rice has a different color from other rice is mainly because its outer bran layer contains anthocyanin pigments. These pigments themselves have strong anti-aging properties. Research both in China and abroad has shown that the darker the color of the rice, the stronger the anti-aging effect of its表皮 pigment, with the effect of black rice pigment being the strongest among all rice varieties. Furthermore, these pigments are rich in flavonoid active substances, five times more than in white rice, and play a significant role in preventing arteriosclerosis.
Dietary Methods for Black Rice
Because black rice is rich in dietary fiber and its starch digests slowly, it has a glycemic index of only 55 (compared to 87 for white rice). Therefore, eating black rice does not cause the sharp fluctuations in blood sugar that eating white rice does. Additionally, the minerals in black rice, such as potassium and magnesium, are beneficial for controlling blood pressure and reducing the risk of cardiovascular and cerebrovascular diseases. Therefore, diabetics and patients with cardiovascular diseases can incorporate black rice into their diet as part of their nutritional therapy. It is best used to make congee.
Generally, black japonica rice and black glutinous rice have the best texture when cooked into congee. When cooking congee with black indica rice, it is best to mix in some glutinous rice to increase its stickiness.
To preserve more of its nutrients, black rice is often not as finely processed as white rice. Instead, after dehusking, it is usually consumed directly in the form of "brown rice." This black rice with a coarser texture is best suited for making congee rather than steamed rice.
When cooking congee, to make it soften more quickly, it is best to pre-soak it to allow it to fully absorb water. Soak it in water for one day in summer and for two days in winter. Then, cook it in a pressure cooker, and it will be ready to eat in about 20 minutes.
To prevent the pigments in black rice from dissolving into the soaking water, gently rinse the rice with cold water before soaking; do not rub it. The water used for soaking the rice should be cooked together with the rice and not discarded, in order to preserve its nutritional content.
In addition to congee, black rice can also be made into desserts, tangyuan (glutinous rice balls), zongzi (rice dumplings), bread, and more. Black rice wine has also been developed, which contains melanin and can provide health benefits.