CAM Reference

Sarsaparilla Root

The dried root of tropical Smilax vines, historically used as a beverage flavoring and in folk herbalism, and frequently confused with the unrelated Indian sarsaparilla and sassafras.

Last reviewed: June 9, 2026

Overview

Sarsaparilla root comes from several species of Smilax — thorny, climbing vines native to the tropical and subtropical regions of Central and South America. The name evokes old-fashioned soda fountains and Western saloons, because sarsaparilla was one of the original flavoring agents in early American soft drinks and root beers. But its history runs deeper than carbonated nostalgia: the root was one of the major New World botanical exports to Europe in the sixteenth century, where it entered both the herbal market and the popular imagination. The dried root is long, fibrous, and mildly starchy, with an earthy, slightly bitter, faintly sweet flavor recognizable to anyone who has tasted old-style root beer.

This page is educational and does not recommend sarsaparilla for any condition. It describes what sarsaparilla root is, how true Smilax sarsaparilla differs from the unrelated plants sold under similar names, how it has traditionally been used, what research can and cannot say, and the safety points raised most often. A theme that runs throughout is the difference between sarsaparilla used as a traditional beverage and flavoring and the concentrated extracts and supplements derived from the root, which are a different kind of exposure.

What it is

Sarsaparilla root refers to the dried root of various Smilax species, including Smilax regelii, Smilax aristolochiifolia, Smilax ornata, and others. It may appear as:

  • dried, cut root material for decoction or infusion
  • tinctures or liquid extracts
  • capsule or powdered supplements
  • a flavoring ingredient in beverages, syrups, and confections, historically and in some current craft products

Chemically, the root is best known for its steroidal saponins — including sarsasaponin, smilasaponin, and the sapogenins sarsasapogenin and smilagenin — alongside phytosterols and flavonoids. The saponin content gives a decoction a mildly foamy quality when agitated, a property that contributed to its early use in carbonated drinks. A point that matters for reading anything about sarsaparilla is naming: the term "sarsaparilla" is applied to several different plants. True sarsaparilla is a Smilax species (family Smilacaceae). "Indian sarsaparilla" is an entirely separate plant, Hemidesmus indicus (family Apocynaceae), used in Ayurvedic traditions and chemically distinct. And sassafras (Sassafras albidum, family Lauraceae), another early root-beer botanical, is a third unrelated plant. These are not interchangeable, and a label reading simply "sarsaparilla" does not by itself confirm which plant is inside.

Traditional use (educational)

Sarsaparilla root has a layered history spanning continents:

  • Indigenous peoples of Central and South America used sarsaparilla root in various traditional preparations long before European contact
  • Spanish traders exported the root to Europe in the sixteenth century, where it became one of the most commercially significant New World botanicals of its era
  • in nineteenth-century America, sarsaparilla became a popular beverage flavoring — "sarsaparilla" drinks were sold at soda fountains and general stores, and the root was a component of early root-beer formulations
  • the root maintained a parallel life in folk herbalism across the Americas, referenced in a range of traditional contexts distinct from its beverage identity

These accounts describe cultural, commercial, and culinary history rather than clinically validated outcomes. The popularity of sarsaparilla as a flavoring is well documented; the broader folk claims attached to it across different eras reflect the herbal frameworks of their time and are presented here for historical and educational context only.

What research says

Research on sarsaparilla root is limited and fragmented. The steroidal saponin content has attracted phytochemical interest — for example, structural studies that isolated and characterized saponins from Smilax roots — and broader reviews of the genus Smilax catalog a wide range of constituents and laboratory-level activities across its many species. However, most of that work concerns either isolated compounds or Smilax species other than the New World sarsaparilla vines, and much of it is in vitro or preclinical. Clinical trials on whole sarsaparilla-root preparations in their traditional form are essentially absent.

Read by evidence tier, the honest picture is that sarsaparilla is far better documented as a historical commodity and flavoring than as a studied herbal preparation. Its considerable commercial significance never translated into a modern clinical research investment, and the available phytochemical data describes what the root and its saponins contain rather than demonstrating health effects in people. Findings on an isolated saponin, or on a different Smilax species, cannot be assumed to describe what a traditional root tea or beverage does. The defensible summary is that sarsaparilla is a chemically interesting root with a rich commercial history and a sparse clinical evidence base, and that this page asserts no specific health effect. In particular, popular marketing claims that link sarsaparilla to testosterone, hormones, anabolic or "steroid" effects, athletic performance, sexual function, or "detox" are not established by the available evidence, and the steroidal saponins it contains are plant compounds, not anabolic steroids. Sarsaparilla should not be used as a substitute for appropriate medical care.

Safety & interactions

Sarsaparilla consumed as a traditional beverage or tea has a long track record, and reference material generally discusses it without major concern at those levels. The considerations that recur mostly concern the saponin content, concentrated products, and plant identity:

  • Traditional beverage and tea amounts: sarsaparilla used as a flavoring or brewed as a root tea has been consumed for generations and is generally regarded as well tolerated at those modest levels.
  • Saponin-related digestive effects: the steroidal saponins can be irritating to the digestive tract, and some people experience gastrointestinal discomfort, particularly with stronger or more concentrated preparations.
  • Concentrated extracts and supplements: capsules, tinctures, and standardized extracts deliver a different and larger saponin exposure than a traditional tea or beverage, and their profile should not be assumed to match casual culinary use.
  • Theoretical absorption and interaction notes: some references discuss the possibility that saponin-containing substances could affect the absorption of certain medications or nutrients, though clinical documentation for sarsaparilla specifically is limited and these notes are precautionary.
  • Plant-identity confusion: because "sarsaparilla" is applied to several unrelated plants, mistaking true Smilax sarsaparilla for Hemidesmus indicus (Indian sarsaparilla) or another root carries its own risk, since the substituted plant has a different chemistry and safety profile.

This page gives no amounts or schedules. The practical point is that traditional beverage use and concentrated supplements are different exposures, and most of the meaningful cautions attach to the concentrated end.

Who should be cautious

Caution is most often suggested for a few groups, and the cautions generally weigh more heavily on concentrated products than on traditional beverage use. People with sensitive digestion may find saponin-containing preparations irritating, especially in concentrated form, and may notice gastrointestinal discomfort. Pregnant and breastfeeding individuals face limited formal safety data for concentrated sarsaparilla preparations, so those products warrant extra care even where traditional beverage use is not specifically flagged.

Anyone taking medication where absorption could plausibly be affected by saponin-rich substances may wish to raise concentrated sarsaparilla products with a clinician or pharmacist, recognizing that the underlying data is thin and largely theoretical. And anyone purchasing "sarsaparilla" should be mindful of plant identity, since products may contain true sarsaparilla (Smilax species), Indian sarsaparilla (Hemidesmus indicus), or other roots sold under similar common names — a distinction that matters both for what a person is actually consuming and for any caution that applies to it.

Quality & sourcing considerations

Species identification is the central quality question for sarsaparilla. Multiple Smilax species are sold under the name, and their chemical profiles vary; Smilax regelii and Smilax ornata are among the most commonly referenced in herbal tradition. Beyond the Smilax genus, the bigger sourcing pitfall is cross-plant substitution: products labeled "sarsaparilla" may contain Hemidesmus indicus or unrelated roots, particularly in commodity markets where botanical-identity verification is inconsistent. A clearly specified botanical name on the label is therefore one of the more useful signals a buyer has.

Physical quality markers are the familiar ones for a dried root: material that is properly dried, fibrous, and aromatic, rather than musty or moldy, which would indicate poor handling or storage. The distinction between whole-root preparations (tea, decoction) and concentrated extracts is also relevant to both saponin exposure and interpretation of any claim, since the two are quite different products. As with other traditional botanicals, transparent sourcing, third-party testing, and clarity about plant part and preparation help separate well-characterized products from those with uncertain provenance.

FAQs

Is sarsaparilla the same as root beer?
Not exactly. Sarsaparilla was one of several botanical flavoring agents used in early root-beer formulations, alongside sassafras, wintergreen, and others. Most modern root beers use artificial flavoring rather than the actual root. True sarsaparilla drinks, made from Smilax root, have their own distinct flavor and are a beverage tradition in their own right.

Is sarsaparilla related to sassafras?
No. Sarsaparilla (Smilax species, Smilacaceae) and sassafras (Sassafras albidum, Lauraceae) are unrelated plants from different botanical families. Both were used in early American beverages, which is the source of the confusion, but they are distinct in both botany and chemistry.

Is true sarsaparilla the same as Indian sarsaparilla?
No. "Indian sarsaparilla" is Hemidesmus indicus, a plant in the family Apocynaceae used in Ayurvedic traditions, and it is botanically and chemically separate from the Smilax vines that yield true sarsaparilla. The shared common name causes frequent confusion, so the botanical name on a product is what actually identifies which plant it is.

Do the "steroidal saponins" in sarsaparilla act like steroids or boost testosterone?
No. The steroidal saponins in sarsaparilla are plant compounds whose chemical backbone is described as "steroidal," but that naming does not make them anabolic steroids or hormones, and consuming them is not a route to raising testosterone or enhancing athletic or sexual performance. Marketing that frames sarsaparilla this way goes beyond what the evidence supports, and this page makes no such claim.

Should anyone be cautious with sarsaparilla?
Used as a traditional tea or beverage flavoring, sarsaparilla suits most people. Extra care is most often suggested for those with sensitive digestion, since saponins can be irritating in concentrated form; for pregnant or breastfeeding individuals considering concentrated supplements, where safety data is limited; and for anyone uncertain about plant identity. A clinician or pharmacist can advise on individual circumstances, particularly regarding concentrated products.

References