Black beans as a food does not directly treat gray hair, but it has some auxiliary effect on turning gray hair into black hair. If patients want to treat gray hair, it is recommended to go to a regular hospital dermatology department for diagnosis and treatment. Chinese medicine believes that black beans have auxiliary blood, swelling, clearing heat and detoxification, nourishing the blood, supplementing the function of deficiency and black hair, patients can choose the following methods to consume black beans: 1, vinegar soaked black beans: you can stir-fry black beans in a frying pan, and then find a suitable size glassware, put the sun-dried black beans, and then add vinegar to it, leaving one-third of the air to leave space for the expansion of the black beans, tighten the lid and place it in a cool and ventilated The lid is tightened and placed in a cool, ventilated place, and can be consumed after 2-3 months of resting; 2, black soybean milk: first of all, wash the black beans, soak in warm water, wait until the black beans are soft, put the black beans into the soybean milk machine, put the right amount of water, cooked and beaten into soybean milk; 3, cooking porridge: patients can cooperate with other foods, such as red beans, black sesame, wolfberries, walnuts, etc., cooked into porridge for consumption or directly cooked with black beans into porridge. It is recommended that patients with kidney disease, stomach disease, and patients allergic to black beans use black beans with caution. If patients are taking other medications, it is recommended that patients consume black beans under the guidance of a physician to avoid other adverse reactions.