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补肾生精，益肺阴之力较胜
健脾止泻作用增强，用于脾虚泄泻
煎服15–30g，大剂量可用至60–250g（张锡纯善用）；研末吞服每次6–10g；补阴宜生用，健脾止泻宜炒用
For educational reference only — not medical advice.
山药（薯蓣）含甾体皂苷（薯蓣皂苷元、薯蓣皂苷）、粘液多糖、尿囊素与淀粉酶，现代研究显示其具降血糖、免疫调节、护肠黏膜及抗氧化作用，对应传统补脾养胃、生津益肺、补肾涩精之功。
Chinese yam contains steroidal saponins (diosgenin, dioscin), mucilage polysaccharides, allantoin, and amylases, with preclinical evidence for hypoglycemic, immunomodulatory, gastric mucosa-protective, and antioxidant effects, aligning with its traditional spleen-stomach tonifying and kidney-essence securing role.
Bensky 指出山药性平味甘，药食两用，为平补三焦之要药。
Bensky describes Shan Yao as neutral and sweet, both food and medicine, a key gentle tonic for all three jiao.
Chen & Chen 综述山药多糖在动物糖尿病模型中具降糖及改善胰岛素敏感性作用。
Chen & Chen summarize that yam polysaccharides lower blood glucose and improve insulin sensitivity in animal diabetes models.
This section is provided for academic reference only and does not constitute medical advice.
湿盛中满或有实邪积滞者不宜单用。
性味平和，一般无毒副作用。含尿囊素、薯蓣皂苷，对糖尿病有辅助降糖作用但不可替代药物。鲜品外敷偶见接触性皮炎。
味甘，温。主伤中，补虚羸，除寒热邪气，补中益气力，长肌肉。久服耳目聪明，轻身不饥延年。
上品
@misc{bencaodian-shan-yao,
author = {{Bencaodian Editorial}},
title = {Shān Yào 山药 (Chinese Yam) — Dioscoreae Rhizoma},
year = {2026},
howpublished = {Bencao Dian: A Bilingual Knowledge Graph of Traditional Chinese Medicine},
url = {https://bencaodian.org/en/herbs/shan-yao},
urldate = {2026-04-09},
note = {CC BY-SA 4.0}
}