Yam is sweet and flat, and enters the lung, spleen and kidney meridians; It is not dry or greasy, and has the effects of invigorating spleen and lung, invigorating stomach and kidney, strengthening kidney and essence, improving hearing and eyesight, helping five internal organs, strengthening bones and muscles, calming nerves and prolonging life. Indications: spleen and stomach weakness, listlessness, anorexia, chronic diarrhea, lung qi deficiency and dryness, cough with excessive phlegm, kidney qi deficiency, soreness of waist and knees, weakness of lower limbs, thirst and frequent urination, nocturnal emission and premature ejaculation, leukorrhagia, skin swelling and obesity. Lycium barbarum taste: sweet; Gender equality. Meridian tropism: Liver tropism; Kidney meridian; Function of lung meridian: nourishing liver; Nourishing kidney; Moisten the lungs. Indications: deficiency of liver and kidney; Dizziness; Unclear vision; Pain in the waist and knees; Impotence and nocturnal emission; Cough due to fatigue; Quench thirst and lead to drink. They are all tonics, of course, you can drink them for a long time.