Zarzaparrilla

What is Zarzaparrilla?

Zarzaparrilla is the dried root of a climbing vine, Smilax aristolochiifolia. In English it is called sarsaparilla or Mexican sarsaparilla. Healers in Mexico and Central America used the root as a tonic for skin and joints.

You will meet it as cut root for tea, as capsules, or as a liquid extract. The same root once gave old-style root beer its flavour.

Here is the honest verdict. Human evidence is very thin, and no modern trial supports a medical claim. Long use in tradition is not proof that it works, and it is not proof that it is safe.

How does Zarzaparrilla work?

No one has shown how zarzaparrilla acts in the human body. The ideas below come from lab and animal work.

The root is rich in saponins, which are soap-like plant compounds. In test tubes, saponins bind some toxins made by gut bacteria. Old writers used this to explain the "blood cleansing" claim, but it has not been shown in people.

In cell studies, flavonoids from Smilax appear to damp down signals linked to swelling. In animals, some extracts lowered markers of liver stress. Whether this happens at the amounts people take is unknown.

Saponins also foam and can irritate the gut lining. That may explain the stomach upset some users report.

What forms does Zarzaparrilla come in?

Zarzaparrilla is sold mostly as dried root for tea, and as capsules or liquid extract.

Common forms: - Cut dried root, simmered as a decoction (a long-boiled tea) - Powdered root in capsules or tablets - Liquid tincture in alcohol or glycerine - Syrups and "blood tonic" blends sold in Latin American markets - Flavouring in root beer and some soft drinks

Labels can mislead. Packs sold as sarsaparilla may hold Indian sarsaparilla (Hemidesmus indicus) or a different Smilax species.

Check the Latin name on the pack. True zarzaparrilla is Smilax aristolochiifolia. Blends often mix it with burdock, yellow dock or nettle.

Where it comes from:

Healers in Mexico and Central America used the root for rashes, sores, joint pain and general weakness. Spanish traders carried it back to Europe from the 1530s.

In Europe it was sold for centuries as a treatment for syphilis, often given alongside mercury. In the 1800s it became a standard "blood purifier" in tonics and patent medicines.

The root stayed in several national pharmacopoeias into the 20th century. It fell out of medical use as better treatments arrived. Its flavour lived on in soft drinks.

What does Zarzaparrilla help with?

• Skin complaints such as psoriasis and eczema: Tradition treated the root as a cleanser for rashes and scaly skin. One small, uncontrolled report from 1942 described improvement in psoriasis with a saponin from the root. No modern controlled trial has tested this, so the claim stays unproven.
• Joint pain, gout and rheumatic aches: Decoctions of the root were a common folk remedy for aching joints. In cell and animal studies, Smilax flavonoids appear to damp inflammation signals. No human trial shows that the root eases joint pain in people.
• General "blood purifying" tonic: This was the root's main old use in Europe and Latin America. "Blood purifying" is not a real medical idea. Your liver and kidneys do that work, and no study shows the root helps them.
• Historic use for syphilis and leprosy: European doctors gave it for syphilis for centuries, often with mercury. A weak, uncontrolled report from the 1950s suggested benefit in leprosy. Both illnesses need modern antibiotics from a doctor, and the root must never be used in their place.
• Marketed as a testosterone or muscle booster: Sports sellers claim the root is a natural steroid. That claim rests on a mix-up between plant sterols and human hormones. No study shows that it raises testosterone or builds muscle in people.
• Flavouring in drinks: This use is real and well established. The root gives the sweet, woody taste in old-style root beer and sarsaparilla sodas. A flavour in a drink is not a medical effect.

Which foods are rich in Zarzaparrilla?

Zarzaparrilla is not a nutrient found in foods. The only food use is as a flavour, mainly in root beer and sarsaparilla sodas. Those drinks often contain little or no real root.

What are the side effects of Zarzaparrilla?

• Stomach upset, nausea or heartburn
• Diarrhoea or loose stools
• Passing more urine than usual
• Skin rash or itching from allergy
• Runny nose, cough or asthma from breathing root dust
• Kidney irritation reported with very large amounts

Good to know:

Most reports are mild and settle when people stop. Gut upset is the usual complaint.

Two problems matter more. Workers who breathe root dust have had asthma attacks and nasal symptoms. Very large amounts have been linked to kidney irritation.

Stop taking it and get advice if a rash, breathing trouble or flank pain starts.

How much Zarzaparrilla should you take?

• Recommended daily: Labels on cut root often list 1 to 4 grams, simmered as a tea, up to three times a day. Tincture labels often list 8 to 15 mL a day. These are label figures only, not advice for you. No trial has set a safe or useful amount. Strength differs a lot between brands. Ask a pharmacist or doctor before you start, above all if you take other medicines.
• Best time of day: Timing does not matter much. The root can make you pass more urine, so some people skip a late evening dose.
• With or without food: Take it with or after food if it upsets your stomach. The saponins in the root can irritate an empty gut.
• Time to effect: There is no reliable answer, because no trial has measured one. People who use it for skin or joints usually speak of weeks, not days. It may well do nothing at all, and you should not delay real treatment while you wait.
• How long to take it: Traditional courses ran for a few weeks, with breaks between them. No study has tested long-term use, so nothing is known about safety past that point. Do not take it for months on end without medical advice.