Nettle Root vs Nettle Leaf: Key Differences
By Real Herbs Editorial Team · Published October 2026 · Updated October 2026 · 7 min read
Key takeaway: Nettle root and nettle leaf come from the same species, Urtica dioica, but they are different herbal materials with different traditional uses and different research. The European Medicines Agency (EMA) lists root for relief of urinary symptoms of benign prostatic hyperplasia (BPH), and leaf for minor joint pain and for flushing the urinary tract. Most prostate trials used root extracts, while the blood sugar and blood pressure trials we found used leaf or mixed products, so results for one should not be read across to the other.
Search for “stinging nettle” and you will find root capsules, leaf teas, leaf powders and mixed products, often described in the same words. This guide sets out how nettle root and nettle leaf differ, what each has been studied for, and how to tell which one a study or a label is talking about.
Disclosure: Real Herbs sells a stinging nettle root extract, not a leaf product. We report each study as it was published, and the trials did not test this exact product.
Same plant, different parts
Stinging nettle (Urtica dioica) is a herbaceous perennial plant with stinging hairs on its leaves and stems ([1], PMID 31163183). People use different parts of it. The root is the underground part: the EMA describes the herbal substance as dried, whole or fragmented underground parts ([2]). The leaf, and the aerial parts above ground that include it, are the other widely used material ([3]).
The EMA root assessment report notes that in folk medicine the herb and leaves were of higher importance than the root ([2]). Today the two materials are sold, studied and regulated separately.
Root and leaf side by side
Swipe sideways to see all columns.
| Feature | Nettle root | Nettle leaf |
|---|---|---|
| Plant part | Dried whole or fragmented underground parts ([2]) | Cut dried leaves ([3]) |
| Traditional use listed by the EMA | Relief of lower urinary tract symptoms related to BPH, after a doctor has excluded serious conditions ([2]) | Relief of minor joint pain, and increasing the amount of urine to flush the urinary tract as an extra measure in minor urinary complaints ([3]) |
| Compounds reported | A lectin called UDA (0.05 to 0.6%), lignans, sterols and several other groups ([2]); also oleanolic acid and steryl glycosides ([4], PMID 29987208) | Polyphenols such as chlorogenic acid and rutin ([5], PMID 30097121); flavonoids from the aerial parts ([6], PMID 31325603); also terpenoids, carotenoids, vitamins and minerals ([4], PMID 29987208) |
| Where the human trials are | Urinary symptoms of BPH, mostly with root extracts or a root and saw palmetto combination ([7], PMID 17509841) | Type 2 diabetes trials using leaf extract or mixed formulas ([8], PMID 24273930; [9], PMID 29228792) |
| Limits listed by the EMA | Hypersensitivity; see a doctor again if complaints worsen or if fever, spasms, blood in the urine, painful urination or urinary retention occur ([2]) | Hypersensitivity; conditions where reduced fluid intake is advised, such as severe heart or kidney disease; courses of up to 4 weeks for joint pain and 2 to 4 weeks for urinary use ([3]) |
The two materials contain different groups of compounds, which is one reason their effects and uses are not assumed to match.
What each has been studied for
Root. The best-known research on nettle root is in men with BPH, where trials of root extracts, and of a root and saw palmetto combination, have measured symptom scores, urine flow and leftover urine ([7], PMID 17509841). Our BPH guide and urinary flow guide set out those results, and the DHT and testosterone and SHBG guides cover the laboratory work.
Leaf. In the trials we found on blood sugar, the product was a leaf extract or a mixed formula. One placebo-controlled trial of a nettle leaf extract (500 mg every 8 hours for 3 months, 46 people per group, added to usual diabetes medicines) reported lower fasting glucose, 2-hour glucose and HbA1c than placebo ([8], PMID 24273930). Another trial tested a mix of nettle leaves, milk thistle seed and olibanum resin ([9], PMID 29228792). These trials say nothing about nettle root. One review summarises the split as root for prostate complaints and leaf extracts for inflammatory joint complaints ([1], PMID 31163183).
Our guides to blood sugar, blood pressure and heart health and kidney and urinary tract health show, topic by topic, which plant part the research used.
Reading studies and labels
A few checks make it easier to tell what you are looking at:
- Plant part. Look for “root” or “radix”. Labels that say only “nettle” or “Urtica dioica” may mean leaf, root or aerial parts.
- Extract ratio and serving. A 10:1 extract means roughly 10 parts of dried plant went into 1 part of extract. Compare that with the amount used in the trial you are reading.
- Single herb or mix. Many trial products combine nettle with other herbs, so the result belongs to the mix.
- Tea versus capsule. A leaf tea and a root extract capsule are different products, even when both are called nettle.
The Real Herbs capsule contains 750 mg of a 10:1 root extract, about 7,500 mg of dried root equivalent. None of the studies cited here tested it. Our dosage, timing and forms guide covers how root products are used in the research.
Safety and when to see a doctor
The EMA lists “none reported” for interactions with both materials ([2]; [3]), yet how nettle behaves alongside regular medicines has been little studied. Tell your doctor or pharmacist about any nettle product you take, whether root or leaf, especially if you use medicines for blood pressure, diabetes, blood thinning or water retention. See our safety guide and interactions guide for details. Get urinary symptoms checked first, because BPH and other conditions can cause the same symptoms.
Frequently asked questions
Is nettle root the same as nettle leaf?
No. They come from the same species, Urtica dioica, but the root is the underground part and the leaf is above ground. The EMA lists different traditional uses for each: urinary symptoms of BPH for root, and minor joint pain and urinary flushing for leaf.
Which part of the nettle is used for prostate health?
Trials on BPH used root extracts, or a combination of root and saw palmetto extracts. Leaf has not been the focus of the prostate research we cite.
Can I use nettle leaf tea instead of nettle root?
The two are different materials, and the research on each is separate. No trial we found compared leaf tea with root extract, so one should not be assumed to replace the other.
Do the blood sugar studies on nettle apply to nettle root?
The blood sugar trials we found used leaf extract or mixed formulas, so they do not tell us about root.
Which part of nettle does Real Herbs sell?
Real Herbs sells a stinging nettle root extract only: 750 mg of a 10:1 extract per capsule.
What does a 10:1 extract mean?
It means roughly 10 parts of dried plant were used to make 1 part of extract. It describes how concentrated the extract is, not how it compares with a leaf product.
Can I take nettle root and nettle leaf together?
No study we found tested them together. Ask your doctor or pharmacist, especially if you take regular medicines.
Is nettle leaf safe for everyone?
The EMA lists conditions where reduced fluid intake is advised, such as severe heart or kidney disease, as a limit for leaf preparations. Ask your doctor before using any nettle product if you have a health condition.
The bottom line
Nettle root and nettle leaf share a species but not a use. Root has the prostate research and leaf has most of the blood sugar research, so reading the plant part on a label or in a study matters more than the word “nettle”. If you are choosing a product for urinary symptoms, get them checked first and talk the choice through with your doctor.
Real Herbs Stinging Nettle Root Extract: 750 mg of 10:1 root extract per capsule (about 7,500 mg dried root equivalent), 100 vegetarian capsules. Backed by our 100-Day Money-Back Guarantee. Real Herbs sells this product. The trials and the EMA documents did not test this exact product.
Related reading
- What is stinging nettle root?
- Stinging nettle root for BPH: what the research shows
- Stinging nettle root and blood sugar
- Nettle root side effects and who should avoid it
References
- Dhouibi R, Affes H, Ben Salem M, Hammami S, Sahnoun Z, Zeghal KM, Ksouda K. Screening of pharmacological uses of Urtica dioica and others benefits. Prog Biophys Mol Biol. 2020;150:67-77. PMID 31163183 · DOI 10.1016/j.pbiomolbio.2019.05.008
- European Medicines Agency, Committee on Herbal Medicinal Products. Assessment report on Urtica dioica L.; Urtica urens L., radix. EMA/HMPC/322627/2023. Final, Revision 1, 22 January 2025. ema.europa.eu
- European Medicines Agency, Committee on Herbal Medicinal Products. Community herbal monograph on Urtica dioica L.; Urtica urens L., folium. EMA/HMPC/508015/2007. 14 January 2010. ema.europa.eu
- Kregiel D, Pawlikowska E, Antolak H. Urtica spp.: ordinary plants with extraordinary properties. Molecules. 2018;23(7):1664. PMID 29987208 · DOI 10.3390/molecules23071664
- Vajic UJ, Grujic-Milanovic J, Miloradovic Z, Jovovic D, Ivanov M, Karanovic D, Savikin K, Bugarski B, Mihailovic-Stanojevic N. Urtica dioica L. leaf extract modulates blood pressure and oxidative stress in spontaneously hypertensive rats. Phytomedicine. 2018;46:39-45. PMID 30097121 · DOI 10.1016/j.phymed.2018.04.037
- Ilhan M, Ali Z, Khan IA, Taştan H, Küpeli Akkol E. Bioactivity-guided isolation of flavonoids from Urtica dioica L. and their effect on endometriosis rat model. J Ethnopharmacol. 2019;243:112100. PMID 31325603 · DOI 10.1016/j.jep.2019.112100
- Chrubasik JE, Roufogalis BD, Wagner H, Chrubasik S. A comprehensive review on the stinging nettle effect and efficacy profiles. Part II: urticae radix. Phytomedicine. 2007;14(7-8):568-79. PMID 17509841 · DOI 10.1016/j.phymed.2007.03.014
- Kianbakht S, Khalighi-Sigaroodi F, Dabaghian FH. Improved glycemic control in patients with advanced type 2 diabetes mellitus taking Urtica dioica leaf extract: a randomized double-blind placebo-controlled clinical trial. Clin Lab. 2013;59(9-10):1071-6. PMID 24273930 · DOI 10.7754/clin.lab.2012.121019
- Khalili N, Fereydoonzadeh R, Mohtashami R, Mehrzadi S, Heydari M, Huseini HF. Silymarin, olibanum, and nettle, a mixed herbal formulation in the treatment of type II diabetes: a randomized, double-blind, placebo-controlled, clinical trial. J Evid Based Complementary Altern Med. 2017;22(4):603-608. PMID 29228792 · DOI 10.1177/2156587217696929
Disclaimer: This article is for educational purposes only and is not medical advice. Talk with a qualified healthcare professional before starting any supplement, especially if you have a medical condition or take medication. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
