Cook black beans, filter juice, add yellow wine to black bean juice, then slice Polygonum Multiflori Radix, mix, steam in a cage and dry in the sun. After steaming for nine times and drying for nine times, you can take it. You can also steam Polygonum multiflorum with yellow wine alone, and repeat this for nine times. There is also a kind of nine-steaming and nine-drying dew. The method is the same as above, that is, steaming in the morning, taking it out during the day to make the dew wet at night in the sun race, and so on for nine days, that is, nine-steaming and nine-drying dew. As for the suitable steaming time, it is about 1 hour. The medicine requires that you try not to touch iron.

Black bean is a kind of beans, one of the five grains, and it tastes flat and belongs to the spleen and kidney meridian. Its efficacy and function are:

1. The oil contained in black beans is mainly unsaturated fatty acid, which can promote the metabolism of cholesterol in blood, prevent arteriosclerosis and avoid excessive accumulation of cholesterol in the body;

2, black beans can also help intestinal peristalsis, so that flatulence or toxins can be excreted smoothly, thus improving constipation;

3. Black beans can prevent osteoporosis. Isoflavone in black beans is phytoestrogen, which can effectively inhibit breast cancer, prostate cancer and colon cancer. The content of protein in black beans is twice that of beef and chicken, which can effectively prevent osteoporosis.

4. Vitamin E of black beans can be a protective layer to prevent oxidation in vivo, and red anthocyanin released from black bean skin can scavenge free radicals in vivo, which has good antioxidant activity and anti-aging effect;

5. Unsaturated fatty acids in black beans are converted into lecithin in human body, which is the main component of brain nerve formation. Calcium and phosphorus contained in black beans can prevent the brain from aging and dullness;

6. Taboo and side effects of black beans: people who are prone to get angry should not eat more black beans, and children or people with weak intestinal function should not eat more black beans, and avoid eating with castor beans and magnolia officinalis.