Sarsaparilla

Smilax ornata Lem.; also Smilax regelii, Smilax medica, Smilax glabra
Evidence Level
Preliminary
2 Clinical Trials
4 Documented Benefits
1/5 Evidence Score

Sarsaparilla is a common name for several climbing vines of the genus Smilax, most notably Smilax ornata (Jamaican sarsaparilla), Smilax regelii (Honduran), and Smilax medica (Mexican), with East Asian Smilax glabra used in traditional Chinese medicine. The dried root contains steroidal saponins including sarsasaponin, smilasaponin, and sarsaparilloside, along with phytosterols such as sitosterol and stigmasterol. Traditional uses span skin support, joint comfort, and so-called blood purification, and the root was historically a flavoring base for root-beer-style beverages. Modern human clinical evidence is sparse and largely indirect; the best peer-reviewed data are animal anti-inflammatory and analgesic studies of Smilax ornata extracts and steroidal saponin pharmacognosy reviews. Sarsaparilla is therefore best framed as a traditional botanical with mechanistic interest but limited direct human trial evidence.

Studied Dose Traditional doses of dried sarsaparilla root range from about 1 to 4 g per day as a decoction or tincture; standardized extract doses are not well established and most modern products provide root powder or fluid extracts within similar daily ranges.
Active Compound Steroidal saponins including sarsasaponin, smilasaponin, sarsaparilloside, and parillin, along with sterols sarsasapogenin and smilagenin and phytosterols such as sitosterol and stigmasterol.

Benefits

Traditional support for skin comfort

Sarsaparilla has a long history of traditional use as a so-called blood purifier and skin tonic in herbal traditions of the Americas and Caribbean, often included in formulations intended to support clear, comfortable skin and overall constitutional health.

Provides plant-source steroidal saponins

Sarsaparilla root supplies steroidal saponins with surfactant and amphiphilic properties that have been characterized in vitro for activity on cell membranes and signaling pathways, contributing to its inclusion in many traditional herbal formulas focused on systemic support.

Helps support joint and musculoskeletal comfort traditionally

Folk uses in the Caribbean and Latin America have employed Smilax ornata and related sarsaparilla species for rheumatic complaints, with preclinical studies showing anti-inflammatory and analgesic activity in standard pain and edema models in animals.

Contributes traditional botanical context to herbal formulas

Sarsaparilla is frequently used as a synergistic ingredient in classical Western herbal formulas focused on so-called cleansing and skin support, and continues to be valued culturally as a flavorful root for traditional beverages and bitters.

Mechanism of action

1

Anti-inflammatory and analgesic activity in preclinical models

Methanol and ethyl acetate extracts of Smilax ornata have shown significant anti-inflammatory and analgesic activity in rodent paw edema and pain models, providing scientific support for traditional anti-rheumatic and skin-soothing uses of Jamaican sarsaparilla root.

2

Steroidal saponin pharmacology

Steroidal saponins from Smilax species have been characterized as exerting cytotoxic, hemolytic, anti-inflammatory, antifungal, and antibacterial actions in vitro, supporting a broad pharmacognostic profile that underpins the genus's traditional medicinal reputation.

3

Phytosterol contribution

Sarsaparilla root supplies plant sterols such as sitosterol and stigmasterol, which can modestly compete with cholesterol absorption and contribute to general phytosterol intake when consumed as part of traditional preparations.

Clinical trials

1
Anti-inflammatory and analgesic preclinical study

In vivo study of methanol, ethyl acetate, and other extracts of Smilax ornata (Jamaican sarsaparilla) in standard rodent models of inflammation and pain (Khan et al., Journal of Ethnopharmacology).

Sprague-Dawley rats in carrageenan paw edema and pain testing.

Methanol extracts at 200 and 400 mg/kg and the ethyl acetate extract at 400 mg/kg produced significant anti-inflammatory activity, and the methanol extract showed analgesic activity, providing scientific justification for traditional Jamaican sarsaparilla use in rheumatic and pain-related complaints.

2
Smilax steroidal saponin pharmacology

Phytochemistry and bioactivity study of steroidal saponins isolated from the roots of Smilax species (Challinor et al., Steroids).

Isolated furostanol and spirostanol saponins in tumor cell lines.

Five steroidal saponins including two new furostanol saponins were isolated and showed antiproliferative effects across multiple tumor cell lines, demonstrating the bioactive saponin chemistry that underlies sarsaparilla's broader pharmacognosy and traditional medicinal reputation.

Side effects and drug interactions

Common Potential side effects

May cause mild gastrointestinal upset, gas, or diarrhea at higher doses.
Saponin content can cause throat or stomach irritation in sensitive individuals.
Rare allergic reactions to Smilax plant material have been described.
May increase urine output as a mild diuretic.
Long-term safety beyond 8–12 weeks of continuous use is not well characterized.

Important Drug interactions

May enhance absorption of digitalis-type cardiac glycosides via saponin effects on intestinal permeability.
Lithium: theoretical interaction via mild diuretic effect; monitor levels.
Hypnotics and other CNS depressants: theoretical additive effects; use with caution.
Drugs with narrow therapeutic index should not be combined without medical supervision.

Frequently asked questions about Sarsaparilla

What is the recommended dosage of Sarsaparilla?

The clinically studied dose for Sarsaparilla is Traditional doses of dried sarsaparilla root range from about 1 to 4 g per day as a decoction or tincture; standardized extract doses are not well established and most modern products provide root powder or fluid extracts within similar daily ranges.. Always follow product labeling and consult a healthcare provider for personalized dosing recommendations.

What is Sarsaparilla used for?

Sarsaparilla is studied for traditional support for skin comfort, provides plant-source steroidal saponins, helps support joint and musculoskeletal comfort traditionally. Sarsaparilla has a long history of traditional use as a so-called blood purifier and skin tonic in herbal traditions of the Americas and Caribbean, often included in formulations intended to support clear, comfortable skin and overall constitutional …

Are there side effects from taking Sarsaparilla?

Reported potential side effects may include: May cause mild gastrointestinal upset, gas, or diarrhea at higher doses. Saponin content can cause throat or stomach irritation in sensitive individuals. Always consult a healthcare provider before starting any new supplement, especially if you have underlying conditions or take medications.

Does Sarsaparilla interact with medications?

Known drug interactions may include: May enhance absorption of digitalis-type cardiac glycosides via saponin effects on intestinal permeability. Lithium: theoretical interaction via mild diuretic effect; monitor levels. Consult a pharmacist or healthcare provider if you take prescription medications.

Is Sarsaparilla good for hair, skin & nails?

Yes, Sarsaparilla is researched for Hair, Skin & Nails support. Sarsaparilla has a long history of traditional use as a so-called blood purifier and skin tonic in herbal traditions of the Americas and Caribbean, often included in formulations intended to support clear, comfortable skin and overall constitutional health.

References(2 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Khan AK, Singh PD, Reese PB, Howden J, Thomas TT. Investigation of the anti-inflammatory and the analgesic effects of the extracts from Smilax ornata Lem. (Jamaican sarsaparilla) plant. Journal of Ethnopharmacology. 2019;J Ethnopharmacol. 2019 Aug 10;240:111830..PubMedUsed to support: Preclinical study showing Smilax ornata (Jamaican sarsaparilla) extracts have significant anti-inflammatory and analgesic activity in rat models.
  2. Challinor VL, Parsons PG, Chap S, White EF, Blanchfield JT, Lehmann RP, De Voss JJ. Steroidal saponins from the roots of Smilax sp.: structure and bioactivity. Steroids. 2012;Steroids. 2012 Apr;77(5):504-11..PubMedUsed to support: Phytochemical and bioactivity study describing structure and antiproliferative activity of steroidal saponins isolated from Smilax (sarsaparilla) roots.