Common kidney-tonifying foods for men are: pork loin, oyster, mutton, dog meat, turtle, leek, silkworm chrysalis, pine nuts, red ginseng, medlar, Polygonum multiflorum Thunb, Eucommia ulmoides Oliv., black sesame, sea cucumber, black beans, lotus seeds, pig's trotters, raw prawns and leeks. Kidney-tonifying food: Pig kidney, sheep kidney and dog kidney are rich in taurine, arginine and zinc, which have the functions of nourishing yin and strengthening yang, tonifying kidney and benefiting qi.