What is Tu Fu Ling?

Tu Fu Ling is a single herb used in Traditional Chinese Medicine. It is the dried root-stem of Smilax glabra, a climbing vine. In the West it is often sold as Chinese sarsaparilla or glabrous greenbrier root.

Practitioners give it for what they call damp-heat. In plain terms, that means hot, itchy, weepy or swollen problems. Common targets are skin rashes, joint pain and burning on passing urine.

It is almost always boiled with other herbs as a soup-like drink. It is rarely taken alone. In southern China it also goes into food, soups and herbal jellies.

Here is the honest verdict. Tu Fu Ling has a long and well-recorded place in Chinese medicine. Good human trials are few, so its long history of use is not proof that it works.

How does Tu Fu Ling work?

No one has shown how Tu Fu Ling works in people. Most of what we know comes from test tubes and animals.

In cell studies, extracts appear to damp down some signals linked to swelling and redness. In mice and rats, the flavonoid astilbin appears to lower uric acid, the waste salt behind gout. Whether either effect happens in a person taking the herb is not established.

Animal work also suggests the extract may protect liver cells against certain poisons. That finding is early. It has not been tested properly in humans.

In Chinese medical theory, the herb is said to drain damp and clear toxin from the body. That is a traditional way of sorting symptoms. It is not a measured biological action.

What forms does Tu Fu Ling come in?

Dried sliced root is the main form. You boil it in water to make a decoction, usually with other herbs.

Granules are a dried water extract that you stir into hot water. Powders and capsules are also sold. Tinctures in alcohol exist but are less traditional.

It is also an ingredient in ready-made Chinese patent formulas and in food products such as herbal jelly and soup packs.

Where it comes from:

Tu Fu Ling has been used in China for centuries. It became famous in the Ming dynasty, when Li Shizhen described it in the Ben Cao Gang Mu (1596).

At that time it was a main remedy for the sores of syphilis. It was also used for people harmed by the mercury given for that disease.

Today it stays a standard item in Chinese herbal practice for damp-heat skin and joint complaints. It is listed in the Chinese Pharmacopoeia.

What does Tu Fu Ling help with?

• Damp-heat skin rashes, such as eczema and psoriasis: This is the most common modern use. Chinese practitioners add Tu Fu Ling to formulas for red, itchy, weepy skin. Human trial evidence for the herb on its own is very thin. The few published studies test whole multi-herb formulas, so we cannot tell what this herb contributed.
• Joint pain and gout-type swelling: Traditional use here is long-standing. Animal work shows astilbin may lower uric acid, the salt behind gout attacks. That has not been confirmed in people. Do not use it in place of gout medicine your doctor has prescribed.
• Burning or frequent urination: Chinese texts list this as a damp-heat sign and use Tu Fu Ling for it. There are no good human trials. Burning urine can mean an infection, which may need antibiotics, so get it checked.
• Sores linked to syphilis (historical use): This is the herb's oldest fame, dating from the Ming dynasty. It is a historical record only. Syphilis is treated with antibiotics today, and no herb replaces that.
• General 'heat and toxin' patterns in Chinese medicine: In practice the herb is chosen by pattern, not by disease name. That approach has strong traditional standing. It has not been tested against placebo in any trial we could identify.

Which foods are rich in Tu Fu Ling?

1. Guilinggao (Chinese herbal jelly): Smilax glabra root is a main listed ingredient
2. Cantonese herbal soups: the dried root is simmered with pork or chicken
3. Packaged Chinese soup herb mixes: often include sliced Tu Fu Ling

Practical Tips:

Food amounts are small and are widely eaten in southern China.

What are the side effects of Tu Fu Ling?

• Nausea or stomach upset
• Loose stools
• Poor appetite with long use
• Dry mouth or dry skin
• Itchy rash from allergy to the herb
• Rare: swelling of the face, lips or throat and trouble breathing

Good to know:

Tu Fu Ling is generally well tolerated in food-like amounts. Most reported problems are mild stomach upset.

Allergic reactions are uncommon but do happen with plant medicines. Stop at once if you get a rash, swelling or wheeze.

Chinese texts warn that long use can dry the body, causing thirst and dry skin. Safety with daily use over many months has not been studied.

How much Tu Fu Ling should you take?

• Recommended daily: The Chinese Pharmacopoeia lists 15 g to 60 g of the dried root per day. That amount is simmered in water to make a decoction. Granules, powders and tinctures are far more concentrated. Follow the label, or the amount a qualified practitioner gives you. No dose has been set by modern human trials. The figures above come from traditional practice and official herb lists.
• Best time of day: A daily decoction is usually split into two doses, one in the morning and one in the evening.
• With or without food: Usually taken between meals. Take it with food if it upsets your stomach.
• Time to effect: Not known from trials. In traditional practice, people are reassessed after about 2 to 4 weeks.
• How long to take it: Short courses are the norm. Most practitioners use it for a few weeks while symptoms are active. Review after 2 to 4 weeks. If nothing has changed, stop and rethink rather than raising the dose. Long daily use for months has not been studied for safety.