Yuan Shen Root
- Chinese
- 元参
- Pinyin
- Yuan Shen
- Latin
- Radix Scrophulariae
Known in TCM as Yuan Shen (元参), this salty and sweet and bitter, cold herb enters the Kidney, Lung, and Stomach. Traditionally, it clears heat and benefits the throat - Yuan Shen is an alternate name for Xuan Shen and is used for painful swollen throat, voice loss, and toxic heat lodged in the upper burner, most often applied for pharyngitis, tonsillitis, and night sweats. Modern research has identified Iridoid among its active constituents.
Part used: Root
Also Known As
Latin: Radix Scrophulariae | Pinyin: Yuan Shen | Chinese: 元参
TCM Properties
- Taste
- salty, sweet, bitter
- Temperature
- cold
- Channels
- Kidney, Lung, Stomach
Traditional Use
Primary Actions
- Clears heat and benefits the throat - Yuan Shen is an alternate name for Xuan Shen and is used for painful swollen throat, voice loss, and toxic heat lodged in the upper burner.
- Enriches yin and cools deficiency heat - it is useful when lingering fever, night sweating, dryness, or restlessness show that heat has damaged fluids.
- Softens hardness and disperses masses - like Xuan Shen, it is a classic herb for scrofula, nodules, and hard swellings in the neck or glandular regions.
Secondary Actions
- Yuan Shen is best understood as a naming variant of Xuan Shen rather than as a different crude drug.
- Its role in warm-disease formulas often reflects a dual job: clear what is excessive while replenishing what has been consumed.
Classic Formulas
- Yang Yin Qing Fei Tang - classic throat and dryness formula using Xuan Shen or Yuan Shen logic to nourish yin while reducing toxic throat swelling.
- Qing Ying Tang - warm-disease formula in which the herb cools nutritive-level heat and protects fluids.
- Xiao Luo Wan - classic nodules and scrofula strategy built around the herb's salty-softening effect.
Classical References
- Traditional naming varies between Xuan Shen and Yuan Shen, but the medicinal identity remains Scrophularia root.
- Classical formula literature repeatedly places the herb in throat, heat-toxin, and nodule-dispelling strategies.
- Its yin-nourishing side is especially important when heat has already consumed fluids and produced irritability or night sweating.
Modern Research
Active Compounds
- Iridoid glycosides - major marker compounds in Radix Scrophulariae
- Phenylpropanoid glycosides - linked to anti-inflammatory and tissue-protective research
- Polysaccharides - studied for antioxidant and anti-inflammatory signaling
- Phenolic and flavonoid compounds - part of the root's broader phytochemical matrix
Studied Effects
- A 2021 review consolidated current understanding of Scrophularia ningpoensis chemistry and pharmacology, supporting the herb's broad anti-inflammatory and heat-clearing reputation (PMID 33338592).
- Extracted polysaccharides showed antioxidant and anti-inflammatory effects in laboratory evaluation, giving a modern correlate for traditional fluid-protective and toxin-clearing logic (PMID 33381217).
- A study on Radix Scrophulariae in hyperthyroidism provides some modern relevance to the traditional use of Yuan Shen for neck swelling and thyroid-region hardness, though it does not establish clinical efficacy (PMID 34650432).
PubMed References
- Pharmacology, phytochemistry, and traditional uses of Scrophularia ningpoensis Hemsl (2021)
- Polysaccharides of Scrophularia ningpoensis Hemsl.: Extraction, Antioxidant, and Anti-Inflammatory Evaluation (2020)
- Effects of Radix Scrophulariae on Hyperthyroidism Assessed by Metabonomics and Network Pharmacology (2021)
Safety & Interactions
Contraindications
- Deficiency-cold digestive weakness with loose stools
- Uncomplicated chronic fatigue without heat, dryness, or nodule formation
- Use in formulas specifically avoiding the traditional incompatibility with Li Lu
Cautions
- Yuan Shen is strongly cooling and can aggravate weak digestion if mismatched to the pattern.
- Modern concentrated extract use should not be assumed equivalent to classical decoction use.
- MSK page not found - drug interaction data not available from Memorial Sloan Kettering integrative medicine database
Drug Interactions
- Thyroid-active medications - theoretical overlap if self-prescribed for thyroid concerns
Conditions
- Pharyngitis Traditional ★★★☆☆ JSON
- Tonsillitis Traditional ★★★☆☆ JSON
- Night Sweats Traditional ★★☆☆☆ JSON
- Insomnia Traditional ★★☆☆☆ JSON
Frequently Asked Questions
What is Yuan Shen Root used for?
Yuan Shen Root is traditionally used to Clears heat and benefits the throat - Yuan Shen is an alternate name for Xuan Shen and is used for painful swollen throat, voice loss, and toxic heat lodged in the upper burner., Enriches yin and cools deficiency heat - it is useful when lingering fever, night sweating, dryness, or restlessness show that heat has damaged fluids., Softens hardness and disperses masses - like Xuan Shen, it is a classic herb for scrofula, nodules, and hard swellings in the neck or glandular regions.. Research has investigated its effects on: A 2021 review consolidated current understanding of Scrophularia ningpoensis chemistry and pharmacology, supporting the herb's broad anti-inflammatory and heat-clearing reputation (PMID 33338592).; Extracted polysaccharides showed antioxidant and anti-inflammatory effects in laboratory evaluation, giving a modern correlate for traditional fluid-protective and toxin-clearing logic (PMID 33381217)..
What are other names for Yuan Shen Root?
Yuan Shen Root is also known as Scrophularia. In TCM: 元参 (Yuan Shen); Radix Scrophulariae.
Is Yuan Shen Root safe during pregnancy?
The safety of Yuan Shen Root during pregnancy has not been established. Consult a qualified healthcare provider before use.
What are the contraindications for Yuan Shen Root?
Yuan Shen Root should not be used in: Deficiency-cold digestive weakness with loose stools; Uncomplicated chronic fatigue without heat, dryness, or nodule formation; Use in formulas specifically avoiding the traditional incompatibility with Li Lu. Consult a qualified practitioner before use.
Does Yuan Shen Root interact with any medications?
Yuan Shen Root may interact with: Thyroid-active medications - theoretical overlap if self-prescribed for thyroid concerns. Always inform your healthcare provider of any herbal supplements you are taking.