1, black beans can nourish liver and kidney, and the health of liver and kidney is very helpful to improve vision.

2. Black beans can relieve eye fatigue and help prevent vision loss.

Because black beans are rich in antioxidant components that are beneficial to the eyes-anthocyanins and vitamin A. Among them, aged vinegar can promote the dissolution of nutrients in black beans and contribute to the efficient absorption of nutrients.

The method of soaking black beans in vinegar is very simple. First prepare a pot, put black beans in it, but do not put oil, stir fry for about 5 minutes on medium heat. After the black beans are boiled, reduce the heat and fry for another 5 minutes, being careful not to fry. Sun-dry the fried black beans for 15 minutes, then put them in a clean container with a lid, then add the aged vinegar and soak them for about two hours. After the aged vinegar is absorbed by black beans, it can be eaten.