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Nettle

Anti-inflammatory support, seasonal allergy relief, and prostate health.

Evidence · Grade DSafety · Use with caution
Traditional useSafety cautionInteraction riskNeeds more research

Nettle is a versatile herb traditionally used for its anti-inflammatory properties, often employed to support urinary tract health, alleviate seasonal allergies, and address prostate concerns.

Last reviewed June 4, 2026 · AI-assisted, human-reviewed
Nettle, also known as stinging nettle (Urtica dioica), is a perennial flowering plant with a long history of use in traditional medicine. The leaves, stems, and roots of the nettle plant have been utilized for various purposes. The aerial parts (leaves and stems) are often used for conditions related to inflammation and allergies, while the root is more commonly associated with prostate health. Nettle contains a variety of bioactive compounds, including flavonoids, carotenoids, vitamins, minerals, and phenolic acids, which contribute to its potential therapeutic effects. It is available in several forms, including teas, tinctures, and capsules.

Quick answer

What it is: Nettle, also known as stinging nettle (Urtica dioica), is a perennial flowering plant with a long history of use in traditional medicine.

May support:Iron Deficiency Anemia, Joint Pain, Osteoarthritis, Allergic Rhinitis, Gout, Alopecia, Interstitial Cystitis, Urticaria, Seasonal Allergies, Asthma, Rheumatoid Arthritis, Hypothyroidism

Evidence:Evidence · Grade D

Safety:Safety · Use with caution

Evidence Summary

Evidence · Grade D

There is some promising evidence from human clinical trials supporting nettle's use for allergic rhinitis and benign prostatic hyperplasia (BPH). Studies suggest it can reduce symptoms of seasonal allergies and improve urinary flow in men with BPH. However, many studies are small, and more large-scale, well-designed trials are needed to confirm these effects and establish optimal dosages.

Last reviewed · Jun 2026

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Why It Works

Nettle may exert its effects through anti-inflammatory, antioxidant, and immunomodulatory actions, potentially influencing various physiological pathways.

How it works in more detail

Nettle's anti-inflammatory properties are thought to be due to its ability to inhibit several inflammatory pathways, including those involving prostaglandins and leukotrienes. It may also modulate immune responses by affecting T-cell activation and cytokine production. For allergic rhinitis, nettle may interfere with histamine receptors and inhibit mast cell degranulation, thereby reducing allergic symptoms. In the context of benign prostatic hyperplasia (BPH), nettle root is believed to influence hormone metabolism, specifically by inhibiting the binding of sex hormone-binding globulin (SHBG) to testosterone, and by affecting prostate cell growth.

How to use

Always consult a qualified clinician.

Editorial guidance

Suggested dosage
For general anti-inflammatory support or seasonal allergies, 300-500 mg of standardized nettle leaf extract, 2-3 times daily, or as a tea (1-2 teaspoons of dried leaf steeped in hot water). For prostate health, 120-360 mg of nettle root extract daily, often in divided doses.
Research dosage range
For allergic rhinitis, 300-600 mg of freeze-dried nettle leaf extract daily. For BPH, 120-360 mg of nettle root extract daily, often in divided doses.
Typical onset
Effects for seasonal allergies may be noticed within a few days to weeks. For prostate health, benefits may take several weeks to months of consistent use.
Typical forms
capsule, tea, tincture, extract
Quality markers
Look for standardized extracts, especially for nettle root, to ensure consistent levels of active compounds. For nettle leaf, choose products that specify freeze-dried material for optimal preservation of active constituents. Organic certification is also a good indicator of quality.
Medication interactions
  • Anticoagulants
  • Antiplatelet drugs
  • Diuretics
  • Antihypertensive drugs
  • Lithium
  • Diabetes medications
Avoid if
  • Pregnant
  • Breastfeeding
  • Known allergy to nettle
  • Taking blood thinners without medical supervision
Pregnancy / lactation
Nettle is generally not recommended during pregnancy due to its potential to stimulate uterine contractions. There is insufficient reliable information about the safety of nettle during lactation, so it is best to avoid use.

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Suggested dosage

For general anti-inflammatory support or seasonal allergies, 300-500 mg of standardized nettle leaf extract, 2-3 times daily, or as a tea (1-2 teaspoons of dried leaf steeped in hot water). For prostate health, 120-360 mg of nettle root extract daily, often in divided doses.

General guidance — discuss specifics with a clinician.

Active medicinal compounds

Flavonoids (quercetin, kaempferol), carotenoids, vitamins (A, C, K), minerals (iron, calcium, magnesium), phenolic acids, lignans, and polysaccharides.

Traditional use

Historically, nettle has been used for centuries in various cultures. Ancient Egyptians used it for arthritis and back pain. In medieval Europe, it was used as a diuretic and for joint pain. Native Americans used it for joint pain, skin conditions, and as a tonic. Traditional applications also include its use for urinary problems, hay fever, and as a spring tonic to 'cleanse' the body.

Safety

Safety warnings

Nettle is generally considered safe for most people when consumed orally in appropriate amounts. Direct contact with fresh nettle leaves can cause skin irritation, stinging, and redness due to histamine and formic acid. Oral consumption may cause mild gastrointestinal upset. Individuals with pre-existing medical conditions should consult a healthcare professional before use.

Avoid if

  • Pregnant
  • Breastfeeding
  • Known allergy to nettle
  • Taking blood thinners without medical supervision

Medication interactions

  • Anticoagulants
  • Antiplatelet drugs
  • Diuretics
  • Antihypertensive drugs
  • Lithium
  • Diabetes medications

Reported side effects

  • Mild stomach upset
  • Diarrhea
  • Constipation
  • Skin irritation (from fresh plant contact)
  • Allergic reactions

Pregnancy & lactation

Nettle is generally not recommended during pregnancy due to its potential to stimulate uterine contractions. There is insufficient reliable information about the safety of nettle during lactation, so it is best to avoid use.

General guidance — discuss specifics with a clinician.

Evidence ecosystem

Scientific literature, clinical guidance, government sources, ongoing research, traditional use, and lived experience — grouped by source type and quality.

No indexed evidence yet. We're still building out this remedy's evidence ecosystem.

Limitations: Many studies on nettle are relatively small, short-term, or have methodological limitations. The exact mechanisms of action are not fully elucidated for all conditions. There is also variability in the quality and standardization of nettle preparations used in research, making direct comparisons challenging.

This page is educational. Statements use phrases like "may support" and "has been studied for"because no remedy here is approved to cure, treat, or reverse any condition. Discussion happens on the ailment pages — community statistics here are derived from those reports. Always consult a qualified clinician.

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