Stinging Nettle

What is it?

Stinging nettle (Urtica dioica) is a perennial plant known for its stinging hairs that cause temporary irritation on contact. It has a long history of use in traditional medicine for its anti-inflammatory, diuretic, and nutritional properties.

How does it work for medicinal purposes?

Stinging nettle works by interacting with various inflammatory pathways in the body. It contains bioactive compounds that inhibit pro-inflammatory cytokines, reduce oxidative stress, and support joint and urinary health. It also acts as a natural diuretic, helping to flush out toxins and excess fluids.

Active Ingredients:

The active ingredients include flavonoids, phenolic acids, vitamins (A, C, K, and several B vitamins), minerals (iron, calcium, magnesium, potassium), and compounds like histamine, serotonin, and acetylcholine.

Forms:

Stinging nettle is available in various forms including dried leaves, root extracts, capsules, tablets, teas, tinctures, and topical creams.

Imbalance or Deficiency:

There is no recognized deficiency for stinging nettle. However, its nutrient-rich profile can help address general nutritional deficiencies and support overall health.

First Medicinal Use:

Stinging nettle has been used medicinally for centuries, with records dating back to ancient Greek and Roman times. It has been used to treat arthritis, lower back pain, and as a diuretic.

What does Stinging Nettle help with?

Stinging nettle is a wild flowering plant covered in fine stinging hairs. People in Europe, Asia and the Americas have eaten it and used it as medicine for thousands of years. The leaf and the root are used for different things.

The library grades nettle B overall. That means at least one good human trial backs at least one use. But the uses are not equal: the root has the most human research, while several old uses rest on tradition alone.

• Enlarged prostate: night-time trips to the toilet and weak urine flow
  Good evidence — human trials of nettle root; trial sizes and doses are not recorded in this file. Nettle root is among the most studied plant options for an enlarged prostate (BPH). In human studies, men reported fewer night trips to the toilet and easier urine flow. It is often paired with saw palmetto. Our file does not record the trial sizes or doses.
  Evidence grade B · Traditional tier T3
• High blood sugar with type 2 diabetes
  Early evidence — several human studies in people with type 2 diabetes; sizes and doses not on file. In several studies of people with type 2 diabetes, nettle leaf extract modestly lowered fasting blood sugar. The studies used it alongside diet and lifestyle change, not instead of them. Researchers proposed that it shifts how cells answer insulin, but that step is still a proposal.
  Evidence grade C · Traditional tier T3
• Aching, stiff joints and arthritis pain
  Early evidence — small human studies of nettle taken by mouth and put on the skin; sizes not on file. Studies tested nettle both as a supplement and rubbed on sore joints. People with arthritis reported less pain with both forms. In lab work, nettle compounds slowed some of the same inflammation paths that common painkillers block.
  Evidence grade C · Traditional tier T3
• Hay fever: sneezing, itchy eyes and a stuffy nose
  Early evidence — early human reports using freeze-dried leaf; no trial size on file. People with hay fever reported less sneezing, itching and stuffiness after one to two weeks of steady use. Freeze-dried leaf was the form used most. In lab studies, nettle blocked receptors and enzymes tied to histamine, the chemical behind allergy symptoms.
  Evidence grade C · Traditional tier T3
• High blood pressure
  Long traditional use · not yet tested in trials — thin human evidence, and the effect on file is described as mild. The human evidence here is weak, and any effect on file is small. Nettle has a long record of use as a mild water pill, which means more urine passed. Lab work hints that it may relax blood vessel walls, but that has not been shown in people.
  Evidence grade D · Traditional tier T3
• Tiredness from low iron
  Long traditional use · not yet tested in trials — food nutrient data and folk use; no human trial on file. Fresh and dried nettle leaves are rich in plant iron and vitamin C. Vitamin C is well established to help the body take up iron from food, though that is general nutrition science, not a trial of nettle. Nettle tea and cooked nettle are a long-standing folk remedy for tiredness and low iron, with no human trial on file.
  Evidence grade insufficient · Traditional tier T3
• Bladder and kidney complaints
  Long traditional use · not yet tested in trials — tradition only; no human trial on file. Nettle has a long history of use as a gentle water pill said to raise urine flow. Folk use covers kidney support and mild urinary discomfort, including the kind linked to prostate growth. Our file holds no human trial for this use.
  Evidence grade insufficient · Traditional tier T3
• Eczema, hives and itchy skin
  Long traditional use · not yet tested in trials — tradition and user reports only; no human trial on file. Nettle is a traditional remedy for eczema, hives and itchy skin. Some people say capsules calm skin flare-ups along with their allergy symptoms. These are reports and tradition, not trial results.
  Evidence grade insufficient · Traditional tier T3
• Low testosterone, low drive and low energy in men
  Long traditional use · not yet tested in trials — lab work on DHT only; no human hormone trial on file. In lab work, compounds in nettle root may slow the change of testosterone into DHT, a stronger form. Whether that shifts hormone levels in men has not been tested in the studies on file. Nettle root is still a common part of men's health blends.
  Evidence grade insufficient · Traditional tier T3

What Stinging Nettle has not been shown to do

• It has not been shown to replace diabetes medicine, diet change or exercise; the studies on file used it as an add-on.
• It has not been shown to lower blood pressure on its own, and the effect described in the file is mild.
• It has not been shown to raise testosterone or free testosterone in men; the file holds only lab work on DHT.
• It has not been shown in any human trial on file to correct iron-deficiency anemia.
• It has not been shown in any human trial on file to clear eczema, hives or itchy skin.
• It has not been shown to cure an enlarged prostate; the studies on file tracked symptoms such as urine flow.

How to read this:

The grades describe how strong the human evidence is, not how well nettle will work for you. A means many matching human trials. B means at least one good one. C means small or early human studies. D means weak or mixed human evidence. Insufficient means lab work, animal work or tradition only. This page lists options and study findings, not advice. Talk with your own clinician before you start, above all if you take medicine for blood sugar, blood pressure or fluid balance.

Conditions and Symptoms it Helps Prevent:

1. Allergic reactions (e.g., hay fever)
2. Prostate issues (e.g., BPH)
3. Joint inflammation (e.g., arthritis)
4. Urinary tract infections
5. Nutritional deficiencies
6. High blood pressure
7. Muscle inflammation
8. Blood sugar imbalances
9. Skin inflammation
10. Anemia

Foods Rich in Stinging Nettle:

Stinging nettle itself can be used as a food:

1. Nettle tea
2. Nettle soup
3. Nettle pesto
4. Nettle-infused oils
5. Nettle smoothies
6. Nettle in salads (cooked)
7. Nettle chips
8. Nettle pasta
9. Nettle beer
10. Nettle bread

Possible Side Effects:

Stinging nettle is generally well tolerated, but potential side effects may include:

• Mild gastrointestinal discomfort (nausea, diarrhea) - <5%
• Skin irritation (when handled raw) - Common
• Allergic reactions (rash, itching) - Rare
• Interactions with blood-thinning medications - Rare

Recommended Daily Dose:

• Capsules/Tablets: Typically 300 mg to 600 mg of dried nettle extract, taken up to three times daily.
• Tea: 1 to 2 cups per day.
• Tincture: 1 to 2 teaspoons per day.

Time to Work:

The benefits of stinging nettle may be noticed within a few days to weeks of consistent use, depending on the condition being treated.

Best Time to Take:

Stinging nettle supplements can be taken at any time of day. If using for diuretic effects, it's best to take earlier in the day to avoid nighttime urination.

With or Without Food:

Stinging nettle can be taken with or without food. Taking it with food may help reduce the likelihood of gastrointestinal discomfort.