Smilax china (Smilax china): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does Smilax china work as an anti-inflammatory?

Smilax china contains active compounds including astilbin, taxifolin, and steroidal saponins that demonstrate anti-inflammatory activity. These compounds work by inhibiting pro-inflammatory cytokines and modulating inflammatory pathways in the body. The flavonoids, particularly astilbin, have shown immunomodulatory effects in laboratory studies. Evidence level C indicates limited clinical data, with most research derived from in vitro and animal studies rather than human trials.

Does Smilax china interact with any medications?

There is limited research on specific drug interactions for Smilax china. Due to its traditional use and active compounds, theoretical interactions may exist with immunosuppressant medications and anti-inflammatory drugs. The herb may also affect liver enzyme pathways involved in drug metabolism. Patients taking prescription medications should consult a qualified healthcare provider before using Smilax china, as comprehensive interaction studies are lacking (Evidence level C).

What is the recommended dosage for Smilax china?

Traditional dosage recommendations for Smilax china include 15-30 grams of dried rhizome daily prepared as a tea or decoction, or 2-4 ml of tincture taken three times daily. In Traditional Chinese Medicine, the herb (known as Tu Fu Ling) is typically prepared as a decoction. Dosage may vary based on the specific condition being treated. Always follow guidance from a qualified herbalist or healthcare practitioner familiar with TCM formulations.

Is Smilax china safe during pregnancy?

Smilax china is considered unsafe during pregnancy and should be avoided. Traditional sources contraindicate its use in pregnant women, particularly at therapeutic doses. The herb has been used historically to treat conditions like syphilis and may affect uterine tissue. There is insufficient safety data for use during breastfeeding. Pregnant or nursing women should not use this herb without explicit guidance from a qualified healthcare provider.

What skin conditions is Smilax china used for?

In Traditional Chinese Medicine, Smilax china (Tu Fu Ling) clears heat and dampness, making it traditionally indicated for skin conditions including syphilitic skin lesions, eczema, psoriasis, and fungal infections. The herb demonstrates antimicrobial and antifungal properties in laboratory studies (Evidence level C). It has been historically used for chronic skin conditions characterized by damp-heat patterns in TCM diagnosis, though clinical trial data remains limited.

Can Smilax china help with joint pain?

Smilax china has been used traditionally in Chinese medicine for joint pain and inflammatory conditions. The anti-inflammatory compounds, including astilbin and flavonoids, may help reduce inflammation associated with joint discomfort. Evidence level C indicates that while traditional use and preliminary research support this application, robust clinical trials in humans are lacking. The herb is typically used as part of a broader TCM formula rather than as a standalone treatment.

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 30 PubMed articles · model: gemma4:31b

Summary

Smilax china L. is a traditional Chinese medicinal herb used for its anti-inflammatory, anti-tumor, and immunomodulatory properties [PMID:40383248, PMID:37541403].

Background

Smilax china L., known as Baqia in China, is an extensively used traditional Chinese medicine [PMID:37541403]. Its roots and rhizomes are primarily utilized in ethnomedicine [PMID:40383248, PMID:38861845].

Traditional uses

Historically used in traditional Chinese medicine to treat various inflammatory disorders, particularly pelvic inflammation [PMID:37541403, PMID:40274031]. It is also used as a common anti-cancer drug [PMID:35718053] and in some contexts as tea or food [PMID:38248852].

Active compounds

The plant contains steroid saponins and flavonoids as predominant groups, with 134 identified chemical constituents [PMID:37541403]. Key active compounds include diosgenin (a steroidal sapogenin) [PMID:40383248, PMID:35677108, PMID:28116217], astilbin [PMID:40274031], scopolin [PMID:35718053], and polyphenols such as resveratrol, oxyresveratrol, and quercetin [PMID:36500424, PMID:25220663, PMID:24919869].

Mechanism of action

Mechanisms vary by compound: Smilax china L. Rhizome (SCR) resets M2-like macrophages to M1-like via ERK1/2 signaling to enhance anti-tumor immune responses [PMID:40383248]. Astilbin blocks the positive feedback between TLR4 and IL-6R signaling pathways in a PPAR-γ-dependent manner [PMID:40274031]. Polysaccharides may inhibit the galectin-3/NLRP3 inflammasome/IL-1β pathway [PMID:34893269] or activate the Nrf2-ARE pathway to reduce oxidative stress [PMID:35571121]. Other effects include inhibition of xanthine oxidase (XOD) [PMID:38861845, PMID:36982233] and Glucose-6-phosphate dehydrogenase (G6PD) [PMID:35991850].

Clinical evidence

Evidence DOral Cancer

A combination extract of Smilax china, Hemidesmus indicus, and Nigella Sativa was reported to completely cure cases of oral cancer [PMID:22557660]

Evidence DHepatocellular Carcinoma

Root extracts and nanovesicles demonstrated anti-proliferative and pro-apoptotic effects in HepG2 cells [PMID:35991850, PMID:41529459]

Evidence DUlcerative Colitis

Pectic polysaccharides and other isolated polysaccharides improved symptoms and reduced inflammatory mediators in DSS-induced mouse models [PMID:37107427, PMID:34893269]

Evidence DHyperuricemia

Extracts reduced serum uric acid levels and improved renal function by inhibiting xanthine oxidase activity in chicken models [PMID:38861845]

Evidence DEndometritis

Astilbin significantly alleviated LPS-induced endometritis in rats [PMID:40274031]

Safety & adverse effects

A toxicity study on compound granules containing Smilax china L. (along with Hedyotis diffusa and Solanum lyratum) was conducted to evaluate acute and long-term safety [PMID:37992881]. Diosgenin, a key constituent, has been demonstrated to be non-toxic in clinical investigations [PMID:35677108].

Evidence summary

The majority of evidence is derived from in vitro studies and animal models (mice, rats, chickens, C. elegans), indicating strong preclinical potential for anti-inflammatory and anti-cancer activities. Clinical evidence is extremely limited, consisting primarily of anecdotal or small-scale reports.

PubMed sources

1.PMID: 32905089 (2020) — Influence of phytochemicals in induced psoriasis (Review). · Experimental and therapeutic medicine
2.PMID: 40383248 (2025) — Smilax china L. Rhizome extract enhances anti-tumor immune responses by resetting M2-like macrophages and tumor-associated macrophages to M1-like via ERK1/2 signaling. · Journal of ethnopharmacology
3.PMID: 37541403 (2024) — Smilax china L.: A review of its botany, ethnopharmacology, phytochemistry, pharmacological activities, actual and potential applications. · Journal of ethnopharmacology
4.PMID: 35677108 (2022) — Diosgenin: An Updated Pharmacological Review and Therapeutic Perspectives. · Oxidative medicine and cellular longevity
5.PMID: 22557660 (1989) — Anti-cancer activity of nigella sativa. · Ancient science of life

Smilax china

Sources & Citations

Calculate a safe dose of Smilax china