Prepared Rehmannia Root
熟地黄 · Shúdìhuáng
Rehmannia glutinosa
性
Warm
味
Sweet
Meridian
Liver, Kidney
Shu Di Huang — raw rehmannia repeatedly steamed and dried with wine until black as lacquer and sweet as malt — is the single most important blood and kidney-yin tonic in Chinese medicine. The Jiaozuo region of Henan produces the canonical 'Huai di huang'. It anchors Liu Wei Di Huang Wan and the entire yin-tonifying category.
🌿 効能
- •Nourishes blood
- •Tonifies kidney yin and essence (jing)
- •Benefits the marrow
📖 用法用量
9–30 g in decoction, simmered 40+ minutes; often paired with aged tangerine peel (chen pi) to aid digestion of its rich, cloying nature.
🔬 現代研究
Catalpol and rehmanniosides are studied for neuroprotective, anti-aging, and hematopoietic effects, with particular research interest in kidney-adrenal axis support.
⚠️ 禁忌
Avoid with spleen deficiency, poor appetite, damp-phlegm, or loose stools.
