Black food tonifies the kidney. Animal and vegetable foods containing natural melanin have the function of tonifying kidney. Black rice, black sesame, black beans, black fermented soybean, black buckwheat, black mulberry, black jujube, dark plum, black olive, longan, black melon seeds, longan, black grapes, black pine nuts, black ants, black fungus, mushrooms, laver, kelp, black-bone chicken, Nostoc flagelliforme, blackcurrant (blackcurrant), etc.

Functions of melanin: ① Scavenging free radicals in the body. ② Anti-oxidation and blood lipid lowering. ③ Anti-tumor. 4 beauty. ⑤ It can promote sexual function. ⑥ tonify kidney and blacken hair.

Tonifying kidney should be done in winter. As the saying goes: "winter supplements, spring kills tigers."