Black beans and mulberries are not suitable for people with spleen and kidney yang deficiency (deficiency of yang qi in the spleen and kidneys). Black beans have the effect of benefiting the essence and brightening the eyes (tonifying the essence and promoting the recovery of eyesight), nourishing the blood and dispelling the wind, and inducing diuresis and detoxification, etc. Black beans are suitable for people with yin deficiency. Mulberry has the effect of nourishing yin, nourishing blood, and improving eyesight, etc. It is also mainly suitable for liver and kidney yin deficiency (deficiency of yin in the liver and kidneys) and other physical and medical conditions, and is not recommended for spleen and kidney yang deficiency. Spleen and kidney yang deficiency refers to the deficiency of yang qi in the spleen and kidneys, which mostly leads to symptoms such as diarrhea, edema, and cold pain in the waist and abdomen. Treatment needs to be through the spleen and kidney yang deficiency food, medicine to regulate the symptoms. Spleen and kidney yang deficiency is recommended to eat more mutton, venison, leeks, beef and other foods. Commonly used proprietary Chinese medicines can be chosen after identification under the guidance of a doctor, such as Spleen and Kidney Two Helping Pills, Pian Zi Lizhong Pills and Yu Gui Pills. Spleen and kidney yang deficiency is recommended to use medication under the guidance of a professional doctor, so as not to delay the condition.