Rehmannia root (prepared) - 熟地黄 (Shu Di Huang)
Prepared Rehmannia Root
熟地黄
Shu Di Huang·Racine de Rehmannia (préparée)
Rehmanniae Radix Praeparata
- Traced and verified origin
- Dispatched within 24/48h, packed to order
- Kept away from light and moisture
According to the classical texts
补血滋阴 益精填髓
Pinyin
Bu Xue Zi Yin · Yi Jing Tian Sui
Overview
The “cooked” form of the root of Rehmannia glutinosa, worked nine times over (“nine cookings”) in rice wine according to the traditional Pao Zhi preparation.
The result: deep black sections, glossy, almost glassy, sticky in texture and sweet and caramelised in scent.
The alchemical transformation changes the register entirely: where the raw form (Sheng Di Huang) cools the Blood and clears Heat, the prepared form (Shu Di Huang) passes into the Bu Xue and Bu Yin registers, those of the Blood and of the in depth. A crucial distinction, never to be confused.
Traditional uses
The foremost herb of the deep of the Water Phase. Traditionally used for constitutions of markedly deficient : deep dryness, empty heat, weak foundations.
It also supplements the Blood and belongs to the register of the Essence (Jing). Present in many major classical blends — unavoidable in the supplementing pharmacopoeia.
Preparation and traditional-use quantity
- Long decoction: 9 to 30 g, simmer for 40 to 60 minutes to extract it properly
- Liu Wei Di Huang Wan: the major blend of the Water Yin (with Shan Yao, Shan Yu Rou, Mu Dan Pi, Fu Ling, Ze Xie)
- Si Wu Tang: the queen blend of the Blood in women (with Dang Gui, Bai Shao, Chuan Xiong)
- Sheng Di / Shu Di distinction: Sheng (raw) cools, Shu (prepared) supplements — never to be confused
Precautions
A herb generous in liquids: to be avoided where the work of transformation is weakened (it can feed Dampness), in cases of deficient Yang with deep cold, or of chronically loose stools.
To be offset in the blend by herbs that move more.
