Knowledge Base/Herbs/Solomon's Seal Rhizome
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补阴药 · Yin-nourishing

Solomon's Seal Rhizome yù zhú · 玉竹

Polygonatum odoratum (rhizome)

Nature and flavour. Sweet, slightly cold; Lung and Stomach systems.

Classed as nourishing Yin and moistening dryness, and as generating fluid to relieve thirst. Its place in the classical framework is narrow and consistent: dryness and fluid depletion in the Lung and Stomach — dry throat, dry cough, thirst. It is one of the gentler Yin-nourishing herbs, and unlike many of that group it is not described as cloying to the digestion.

性味归经。甘，微寒；归肺、胃经。

归类为养阴润燥、生津止渴。它在传统框架中的位置较窄而一致：肺胃阴伤、燥热伤津所致的咽干口燥、干咳少痰、口渴。它属养阴药中较平和的一味，且不像同类多数药物那样被描述为滋腻碍胃。

Classical category · no formulas, no dosages, no herb-drug combinations are given.
Safety. The tradition itself cautions against it where there is dampness with phlegm, or where the Spleen is weak with loose stool — a Yin-nourishing herb can make both worse. The raw rhizome and the steamed, processed form are not treated as the same material in traditional practice. Human safety data in pregnancy and breastfeeding are insufficient.

传统本身即指出痰湿内蕴、脾虚便溏者不宜——养阴之品可能加重这两者。生品与蒸制炮制品在传统用法中不作同一物看待。妊娠期与哺乳期的人体安全性数据不足。

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