Very good.

It is recommended to use this:

1. Prepare 500g black beans and 1000ml vinegar;

2. Pour the black beans and vinegar into the water, stir evenly and simmer over low heat. Make it for more than 40 minutes, concentrate it into a paste, and store it (at 15 minutes, filter the beans with gauze);

3. After cooling, use a brush to evenly apply the "black bean paste" to your hair comb your hair repeatedly for 10-15 minutes, especially on gray hair areas;

4. Leave the color on for more than 30 minutes, and then rinse clean;

As for the number of uses, you can Follow your own hair washing routine. In principle, 1-2 times a week is enough. Apply this juice to your hair after each shampoo, and your hair will turn black immediately.