Stinging Nettle Root for Prostate Health: What the Research Shows

What is stinging nettle root?

Stinging nettle (Urtica dioica) is a leafy plant that grows in temperate climates around the world. Different parts are used for different purposes. The leaves are traditionally used for joint pain and seasonal allergies, while the root is the part used for prostate and urinary support, according to the NIH’s National Center for Complementary and Integrative Health (NCCIH). When you’re shopping for a prostate product, check that the label says nettle root, not just “nettle.”

Nettle root is sold as capsules, tablets, liquid extracts and teas, and it’s a common ingredient in multi-ingredient prostate formulas, often alongside saw palmetto, pygeum or beta-sitosterol.

Why men use it: a quick look at BPH

Benign prostatic hyperplasia (BPH) is a non-cancerous enlargement of the prostate that becomes very common with age. As the gland grows, it can squeeze the urethra and cause a weak or stop-start stream, urgency, a feeling of incomplete emptying and frequent nighttime urination, as the NIH’s NIDDK explains. Researchers typically measure these symptoms with the International Prostate Symptom Score (IPSS), a standard questionnaire.

How nettle root might work

Scientists don’t fully understand how nettle root affects the prostate. Laboratory and animal studies have suggested several possible mechanisms, including effects on hormone-binding proteins, on enzymes involved in hormone metabolism, and on the growth of prostate cells. These are early-stage findings, and they don’t prove what happens when men take nettle root by mouth. That’s why the human trials below matter most.

What the research shows

Randomized controlled trials

• 100 men with BPH (2013): in a randomized, double-blind study, men taking nettle reported greater improvement in urinary symptom scores than those taking a placebo (Ghorbanibirgani et al., 2013).
• 620 men over six months (2005): NCCIH summarizes a double-blind, placebo-controlled trial in which nettle root produced significant improvements in IPSS scores, maximum urine flow and lower urinary tract symptoms compared with placebo.

Systematic reviews

• 2016 meta-analysis: pooling five trials with 1,128 men, researchers concluded nettle was more effective than placebo or controls for symptom scores, peak urine flow and prostate volume (Men et al., 2016).
• 2025 systematic review: a newer review of six randomized trials with 1,210 men found nettle slightly improved BPH symptom scores over up to 12 months. However, it rated the certainty of the evidence as very low, because the risk of bias in most included studies was unclear or high (Urtica dioica for BPH, 2025). The authors called the evidence promising and said larger, more rigorous studies are needed.

Nettle combined with saw palmetto

Nettle root is often paired with saw palmetto. NCCIH notes some limited evidence that this combination may help lower urinary tract symptoms linked to BPH. That’s interesting, because saw palmetto on its own hasn’t held up well: large trials and a Cochrane review found it no better than placebo for BPH symptoms (NCCIH).

The bottom line on the evidence

Taken together, the research on nettle root is encouraging but not conclusive. Most positive trials used specific, standardized root extracts, so the results may not apply to every product, especially blends that don’t disclose how much nettle they contain.

Nettle root vs. other prostate herbs

Is nettle root safe?

Nettle root is generally well tolerated in studies, with mild stomach upset being the most commonly reported complaint. A few important cautions:

• Blood pressure and blood sugar: nettle may lower blood pressure and affect blood sugar, so use caution if you take medications for high blood pressure or diabetes.
• Medication interactions: it may interact with blood thinners, diuretics (water pills), anti-inflammatory drugs and, possibly, prescription BPH medications. Check with your doctor or pharmacist first.
• Don’t self-diagnose: BPH symptoms overlap with other conditions, including infections and prostate cancer. Get new or worsening urinary symptoms checked before trying any supplement, so a supplement doesn’t mask something that needs treatment.
• Allergies: avoid it if you’re allergic to nettle or related plants.

There’s no single standard dose. Clinical trials used different standardized root extracts, so follow the product label and your doctor’s advice rather than guessing.

Is nettle root worth trying?

For men with mild to moderate BPH symptoms who want to try a natural option, nettle root is one of the better-supported herbs, and its safety record is reassuring. It makes the most sense alongside proven habits like limiting evening fluids and caffeine, and with your doctor’s knowledge. If you have severe symptoms, can’t empty your bladder, or see blood in your urine, see a doctor promptly rather than trying supplements.