What is New Jersey Tea?

New Jersey Tea is a small wild shrub of eastern North America. Herbalists use the root and root bark. The dried root is red-brown, which is why it is also called Red Root.

The leaves brew into a mild, caffeine-free drink. American colonists used them as a tea substitute. Most herbal products today use the root, not the leaf.

Folk use is not proof that something works or that it is safe. For this plant, human evidence is close to absent. Read what follows as tradition, not as proven medicine.

How does New Jersey Tea work?

No one has shown how, or whether, New Jersey Tea works in people.

The root is rich in tannins. In test tubes, tannins bind proteins and make soft tissue feel tighter and drier. This is why the root tastes dry in the mouth, and it is the basis of its old use as an astringent (something that dries and tightens tissue).

The root also holds cyclopeptide alkaloids, a group of ring-shaped plant compounds. In animal work, some of these lowered blood pressure. That has not been tested in people.

Older reports claimed the root shortened the time blood takes to clot. This was never confirmed in good human studies. We treat it as unproven, but we still take it seriously as a possible risk.

What forms does New Jersey Tea come in?

You will mostly meet it in these forms.

- Dried cut root or root bark, brewed as a decoction (root simmered in water) - Liquid tincture, usually in alcohol - Capsules or tablets of powdered root - Dried leaf, sold as a caffeine-free tea - Blended products marketed for the lymph glands or the spleen

Products are not standardised. The amount of active compounds can vary a lot between brands and batches.

Where it comes from:

Native American groups, including the Cherokee and Delaware, used the root in their own healing practice. Uses recorded by outsiders included sore throat washes and bowel complaints.

In the 1800s, Eclectic physicians in the United States took it up as Red Root. Their texts, such as King's American Dispensatory, listed it for sore throat, swollen glands, spleen complaints and bleeding.

The leaf has a separate story. It was brewed as a tea substitute around the time of the American Revolution, when imported tea was scarce or boycotted.

These are historical records of what people did. They are not a recommendation to do the same.

What does New Jersey Tea help with?

• Sore throat and sore mouth (as a gargle): This is the oldest and most common use. Eclectic texts described gargling a root decoction for a raw throat. Tannins do bind proteins in test tubes, which can feel drying on the lining of the mouth. Whether this helps a sore throat heal has not been tested in people. We found no human trials of New Jersey Tea for throat or mouth problems.
• Swollen lymph glands: Nineteenth-century writers claimed it acted on the lymph system, and modern sellers repeat this. The claim rests on tradition alone. There is no human study showing it shrinks swollen glands or changes lymph flow. Swollen glands can signal infection or something more serious. They are a reason to see a doctor, not to self-treat.
• Spleen and 'sluggish' complaints in old Eclectic practice: Eclectic doctors gave Red Root for what they called an enlarged or congested spleen. Their disease labels do not map neatly onto modern diagnoses. No research has tested the plant for any spleen condition in people. An enlarged spleen today is a medical finding that needs a doctor to assess it.
• Loose stools and diarrhoea: Tannin-rich plants have a long folk record for loose stools. New Jersey Tea root was used this way. The idea is that tannins tighten the gut lining. That has been seen in laboratory settings, not in trials of this plant. Diarrhoea that lasts more than two days, or comes with blood or fever, needs medical care.
• Minor bleeding, such as nosebleed: Old sources described the root as a styptic, meaning something that slows bleeding. Some writers said it sped up clotting. This was never confirmed in modern human studies. It also sits oddly beside the warning below about blood thinners. Because the effect on clotting is unclear in both directions, we treat it as a caution rather than a benefit.
• A caffeine-free tea from the leaf: This is the one use with a clear historical basis. The dried leaf makes a mild drink with no caffeine. It is a beverage, not a treatment. No health benefit has been shown for it. The leaf and the root are not the same thing, and the cautions on this page apply mainly to the root.

Which foods are rich in New Jersey Tea?

New Jersey Tea is not a nutrient and is not found in everyday foods. The dried leaf has been used as a caffeine-free tea, but that is a drink rather than a food source of anything.

What are the side effects of New Jersey Tea?

• Stomach upset or nausea
• Constipation
• A dry, puckering feel in the mouth
• Poorer absorption of iron from food and supplements
• Possible changes in how fast blood clots (reported, not well studied)
• Rash, itching or swelling in people allergic to the plant

Good to know:

Most reported effects are mild and come from the tannins in the root. They usually settle when you stop.

The serious concern is not common upset. It is the unclear effect on blood clotting, which matters most if you take a blood thinner or face surgery.

Because there are no modern safety studies, rare harms would not yet be known. Absence of reports is not the same as safety.

How much New Jersey Tea should you take?

• Recommended daily: This is not a personal instruction. It is what product labels and older herbal texts typically carry. Labels for the dried root often list 1 to 2 grams, simmered in water, up to three times a day. Tincture labels often list 2 to 4 millilitres, up to three times a day. There is no human research behind these numbers. They come from tradition and from what sellers have settled on. If you take a blood thinner or any daily medicine, ask a pharmacist or doctor before you use it at all.
• Best time of day: The time of day does not appear to matter. Tannin-rich teas can feel harsh on an empty stomach. Many people find it easier later in the day, after eating. If you also take iron tablets, keep the two apart by at least two hours.
• With or without food: Taking it with or just after food is the gentler option. Tannins can irritate the stomach lining and cause nausea when the stomach is empty. Tannins also bind iron in the gut. Space it well away from iron supplements and from iron-rich meals if your iron is low.
• Time to effect: Honestly: it may do nothing at all. The drying, puckering feel of a gargle is immediate. That is a taste and texture effect, not proof of healing. For swollen glands, spleen complaints or bleeding, no reliable time to effect can be given, because no human trial has measured one.
• How long to take it: Folk use was short. Herbal texts describe courses of a few days to about two weeks, often for an acute problem like a sore throat. No one has studied long daily use. Safety over months or years is unknown. Do not keep using it to mask a symptom that is not getting better.