Sarsaparilla / Rough bindweed

What is Sarsaparilla / Rough bindweed?

Sarsaparilla here means Smilax aspera, a thorny climbing vine of southern Europe. It is also called rough bindweed. The root and rhizome (underground stem) were the parts used as a remedy.

Village healers in Spain, Portugal, Italy and Greece gave the root as a spring tonic. It was also used for skin rashes and joint pain. Human evidence for any of these uses is very thin.

Long use in folk medicine is not proof of effect, and not proof of safety. Shop sarsaparilla is often a different plant. Most capsules and drinks use Smilax ornata or Smilax regelii from the Americas.

How does Sarsaparilla / Rough bindweed work?

No one has shown how Smilax aspera works in people. The ideas below come from lab and animal work, not from trials.

The root holds steroidal saponins, which are soap-like plant compounds. In test tubes, saponins bind cholesterol and bile salts. Whether that changes anything inside the body is not known.

In cell and animal studies, extracts of Smilax aspera appear to lower markers of inflammation. Lab tests also show antioxidant activity. These are early signals, not proof of a health effect.

Folk writers called the root a blood purifier. That idea does not match how the body works. Your kidneys and liver clear waste from blood, and no herb takes over that job.

What forms does Sarsaparilla / Rough bindweed come in?

Sarsaparilla reaches you in a few shapes.

- Dried root and rhizome, for a decoction (a simmered water extract) - Tea bags and blended tonic tea mixes - Capsules and tablets of powdered root - Liquid extracts and tinctures made with alcohol - Root beer and soft drinks, flavoured with sarsaparilla or a lab-made stand-in

Check the species named on the label. Many products marked sarsaparilla hold Smilax ornata or Smilax regelii. The European plant, Smilax aspera, is less common in trade.

In Spain and Italy the young shoots are eaten as a vegetable. They are cooked much like asparagus. That food use is separate from the root remedy.

Where it comes from:

Smilax aspera has a long record in Mediterranean folk medicine.

Healers simmered the root in water and gave it in spring. It was framed as a way to clean the blood after winter. The same drink was offered for rashes and aching joints.

From the 1500s, American sarsaparilla was shipped into Europe and sold against syphilis. The cheaper local vine was swapped in when the import cost too much. Later doctors found that neither plant worked for that disease.

By the 1800s the root was mainly a flavouring and a pharmacy tonic. Official medicine dropped it as proof failed to appear. Country use carried on, and the flavour survived in soft drinks.

What does Sarsaparilla / Rough bindweed help with?

• Skin complaints such as eczema and psoriasis: This was the main folk use for the root. Healers gave it for itchy, scaly or weeping skin. There are no controlled human trials of Smilax aspera for skin disease. Old reports used American sarsaparilla species in psoriasis. Those studies were small and poorly designed. Skin problems come and go on their own. That makes personal before-and-after stories weak evidence.
• Joint pain and rheumatism: Tradition used the root for stiff, aching joints. It was often taken as a long spring course. In cell and animal studies, Smilax extracts appear to lower inflammation markers. Whether that helps a painful joint in a person is not known. No trial has tested the root against arthritis in people.
• Spring tonic and so-called blood cleansing: Rural households drank the root in spring to refresh the body. The idea was to wash out winter waste. Blood cleansing is not a real process. Your kidneys and liver already do that work every day. There is no evidence that sarsaparilla improves on them.
• Mild water pill (diuretic) effect: Folk texts say the root makes you pass more urine. Some users still report this. The effect has not been measured in a proper human study. Saponins are the usual explanation given, but that is a theory. If you already take a water pill, adding this is a reason to speak to your doctor first.
• Poor appetite and sluggish digestion: The tannins give the root a bitter, drying taste. Bitter drinks were a common European way to wake up the appetite. Bitters can trigger saliva and stomach juices. That broad effect is not specific to sarsaparilla. No trial supports this plant for digestion.
• Historic use against syphilis: From the 1500s to the 1800s, sarsaparilla was sold across Europe for syphilis. It did not work. The disease is treated today with antibiotics prescribed by a doctor. This entry is history only, and is not a reason to try the plant.

Which foods are rich in Sarsaparilla / Rough bindweed?

Young shoots of Smilax aspera are eaten as a cooked vegetable in parts of Spain, Italy and Greece. Sarsaparilla flavour in root beer usually comes from other Smilax species or from a lab-made flavour.

What are the side effects of Sarsaparilla / Rough bindweed?

• Stomach upset and cramps
• Nausea
• Loose stools or diarrhoea
• Heartburn
• Dry, rough feeling in the mouth and throat
• Skin rash from allergy
• Wheeze or asthma-like attacks after breathing root dust
• Passing more urine than usual
• Kidney irritation after large amounts

Good to know:

Most people who take small, food-level amounts report nothing. The commonest complaint is stomach upset.

Saponins irritate the gut lining. Large doses can bring nausea, cramps and loose stools. These usually settle once you stop.

Rarer problems are allergy and airway irritation. Workers handling sarsaparilla root dust have had asthma-like attacks. Rashes have also been reported.

Serious harm is not common in the reports we have. But no proper human safety study exists. Treat that gap as unknown risk, not as proof of safety.

How much Sarsaparilla / Rough bindweed should you take?

• Recommended daily: This page gives no personal dose. What follows is only the kind of figure a label carries. Capsule labels often list 400 to 500 mg of dried root, once or twice a day. Tea packs often suggest 1 to 2 g of root per cup. These numbers come from custom, not from trials. No safe or useful dose has been set in people. More is not better with saponins. Large amounts can irritate the stomach and gut.
• Best time of day: Time of day does not matter much here. No evidence says morning or evening works better. Tradition took it as a daytime drink, usually with a meal. If a product upsets your stomach, food may help.
• With or without food: Food is the safer default. Saponins can irritate an empty stomach. Take tea or capsules with a meal if you are prone to reflux or nausea. Drink a glass of water with it.
• Time to effect: Expect nothing fast. No trial evidence says when, or whether, an effect appears. Traditional users judged it after two to four weeks. Skin and joint problems also shift on their own over that time. That makes your own results hard to read. It may do nothing at all for you. That is the honest answer.
• How long to take it: Folk use was short and seasonal, often a few weeks in spring. No study has tested long use in people. Safety beyond a few weeks is unknown. Most herbalists keep courses short for that reason. If nothing has changed after a few weeks, stop. Staying on a remedy that does nothing can delay real care.