Men who have a weak kidney should eat more warm foods in their daily diet, such as mutton, donkey meat, quail, pigeon meat and so on. In addition, eating more black food also helps to tonify the kidney, such as black sesame, black fungus, mulberry, black rice, black beans and so on. You can also use some Chinese herbs to make water to drink instead of tea, such as wolfberry, dry ginger, cuscuta and so on.