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The fresh or dried tuberous root of Rehmannia glutinosa (Scrophulariaceae). Enters the Heart, Liver, and Kidney channels. Sweet, bitter, and cold, it is the foremost herb for clearing heat and cooling blood, nourishing yin and generating fluids, and is the first choice for warm-disease patterns involving the constructive and blood levels.
清热生津、凉血之力较胜，多用于热病伤津
清热凉血、养阴生津
鲜品用量加倍至12–30g，捣汁饮用；煎服干品9–15g；清热凉血宜生用
Reference range for non-pregnant adults. Not a personalized prescription. Pregnancy, lactation, and pediatric use require specialist supervision.
Documented interactions exist with the following Western drug classes. Click to view mechanism, severity, and clinical recommendations.
Protective guidance only — when to avoid or use with caution. This block deliberately omits pregnancy, lactation, and pediatric dosing: any such use must be managed by a qualified TCM practitioner or appropriate specialist.
脾虚湿滞、腹满便溏者不宜使用。
性寒滋腻，脾胃虚弱、食少便溏、胸闷多痰者不宜使用。不宜与萝卜、葱、蒜同食（古训）。
味甘，寒。主折跌绝筋，伤中，逐血痹，填骨髓，长肌肉。作汤除寒热积聚，除痹。生者尤良。久服轻身不老。
上品
@misc{bencaodian-sheng-di-huang,
author = {{Bencaodian Editorial}},
title = {Shēng Dì Huáng 生地黄 (Fresh Rehmannia Root) — Rehmanniae Radix},
year = {2026},
howpublished = {Bencao Dian: A Bilingual Knowledge Graph of Traditional Chinese Medicine},
url = {https://bencaodian.org/en/herbs/sheng-di-huang},
urldate = {2026-04-17},
note = {CC BY-SA 4.0}
}© Bencaodian Editorial · Licensed under CC BY-SA 4.0
生地黄主含环烯醚萜苷类（梓醇等）及多糖，具有免疫调节、抗炎、降血糖、养阴生津作用。
Raw Rehmannia contains iridoid glycosides (catalpol) and polysaccharides, with immunomodulatory, anti-inflammatory, hypoglycemic and yin-nourishing activities.
清热凉血养阴生津，主治温病热入营血。
Clears heat, cools blood, and nourishes yin; principal for warm disease entering nutritive and blood levels.
梓醇具有神经保护及降血糖作用，被广泛研究。
Catalpol exhibits neuroprotective and hypoglycemic activities extensively documented in pharmacology literature.
《中国药典》规定生地黄含梓醇不得少于0.20%。
The Chinese Pharmacopoeia requires not less than 0.20% catalpol in raw Rehmannia.
This section is provided for academic reference only and does not constitute medical advice.