
Dipsacus asper
Also known as Himalayan teasel, Japanese teasel, teasel root, xu duan, xù duàn, chuān xù duàn.
Xu duan is the root of a tall teasel native to southwest China and the eastern Himalaya, cultivated mainly in Sichuan, Hubei and Yunnan. The name means 'restore what is broken', which states its reputation plainly: it is a warming tonic for the liver and kidney that is reached for whenever bones, sinews or the lower back need strengthening or mending. It sits among the yang tonics in the Chinese materia medica and is a standard component of formulas for injury, back pain and the securing of pregnancy.

Ask Herbert about Sichuan teasel. Herbert is the master herbalist inside Bountiful Herbs: he answers from this plate and eleven hundred others, with dosing, pairing and cautions. Your first ten questions are free.
Ask HerbertA dull, weak, aching low back that worsens with standing and improves with rest and warmth, in a person who feels cold and tired
A fracture or ligament tear that is healing slowly in someone past middle age
Habitual miscarriage or a sore, heavy lower back in early pregnancy with a kidney deficiency picture, managed by an experienced TCM practitioner
The record lists 4 contraindications; open the plate in the library to read them in full.
Xu duan is one of the gentler kidney tonics: it warms without being hot and tonifies while still moving, so it suits old injuries, chronic low back pain and weak knees without the congestion heavier tonics can cause.
Temperature: slightly warm. Taste: bitter, sweet, acrid. Channels: Liver, Kidney. Actions: Tonifies the Liver and Kidney and strengthens the sinews and bones; Promotes the mending of fractures and healing of traumatic injury; Moves the blood gently while stopping bleeding; Secures the Chong and Ren vessels and calms the fetus; Dispels wind-damp from the lower body.
| Preparation | As written | Metric |
|---|---|---|
| Decoction | 9-15 g dried root daily | 9000-15000 mg |
| Powder or granules | 2-4 g daily in divided doses | 2000-4000 mg |
| Tincture (1:5, 45%) | 2-4 mL three times daily | 2-4 mL |
Doses are reproduced from the sources for practitioners and are not a recommendation for any person.
Overview. Xu duan is the root of a tall teasel native to southwest China and the eastern Himalaya, cultivated mainly in Sichuan, Hubei and Yunnan. The name means 'restore what is broken', which states its reputation plainly: it is a warming tonic for the liver and kidney that is reached for whenever bones, sinews or the lower back need strengthening or mending. It sits among the yang tonics in the Chinese materia medica and is a standard component of formulas for injury, back pain and the securing of pregnancy.
Clinical Notes. Xu duan is one of the gentler kidney tonics: it warms without being hot and tonifies while still moving, so it suits old injuries, chronic low back pain and weak knees without the congestion heavier tonics can cause.
Chinese Medicine Profile. Temperature: slightly warm. Taste: bitter, sweet, acrid. Channels: Liver, Kidney. Actions: Tonifies the Liver and Kidney and strengthens the sinews and bones; Promotes the mending of fractures and healing of traumatic injury; Moves the blood gently while stopping bleeding; Secures the Chong and Ren vessels and calms the fetus; Dispels wind-damp from the lower body.
Sichuan teasel stands in 11 documented formulas in the library, among them shòu tài wán, sãn bì tāng, cháng ning tàng.

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