Eat it at the peak of kidney meridian at 5-7 o'clock every night, about 20-30, 25 is the best. Stick to this for two months, and women can take it to tonify kidney and blacken hair, lose weight and relieve gynecological diseases.

Method for soaking black beans in vinegar

1. Put the washed and dried black beans into a wok and stir fry over medium heat.

2. After five minutes, you can smell the fragrance of beans and hear the sound of snapping. This is a black bean with a broken skin. After all the skins burst open, turn to low heat and fry for another five minutes.

3. Put it in a container and cool it in a ventilated place.

4. Put the cooled black beans into a container with a lid and pour the vinegar without beans.

When black beans have absorbed all the vinegar, they can be eaten. Add honey and mix well to serve.