[Eat more mutton in winter to strengthen the kidneys] Some hot foods, such as mutton, are foods that warm the kidneys, strengthen the yang, and produce high heat. People with weak constitutions can eat them appropriately. Eat less cold food. When eating cold food such as crabs, it is recommended to accompany it with warmed rice wine and add shredded ginger to help drive away the cold. In addition, the diet should not be too salty, because the salty taste enters the kidneys, making the kidney water colder, affecting the deficiency of heart yang and adversely affecting the heart.