Help strengthen the spleen and stomach, invigorate the lungs and qi, nourish the kidney essence, nourish and strengthen the eyes, and delay aging
"Compendium of Materia Medica": "Benefits the kidney qi, strengthens the spleen and stomach, stops diarrhea, resolves phlegm and saliva, and moisturizes the skin and hair."
"Compendium of Materia Medica": "Yam can strengthen the spleen and invigorate the deficiency, nourish the essence and invigorate the kidney, cure all kinds of deficiency and damage, and treat the five strains and seven injuries. The second is that its qi is mild and slow, and it is not worthy of full-time duties. The kidney-tonifying water must be used for the Zhu and the ground; the astringency and turbidity must be broken, so they should be studied together;