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I’ve spent years recommending nettles to clients because they can provide immediate relief during peak allergy season. When I started taking nettles supplements, the sinus pressure I’d battled every spring had eased, and I had the pleasure of avoiding conventional antihistamines-all of which have some long-term health risks. One of the healthiest — and most underrated — plants on the planet, nettles have medicinal benefits that are seemingly endless. Read on to discover what the latest research shows, and why this herb has a permanent place in my own wellness routine.
Table of Contents
Why are Nettles so Healthy?
As a medicinal food that naturally grows all over the world, nettles contain tiny needle-like hairs, or trichomes, that can cause temporary stinging. Thus the name stinging nettle is a common way of referring to this plant. Once nettles is cooked or boiled the “sting” is deactivated. This temporary “sting” is thought to be part of how nettles ultimately decrease pain.
Rich in antioxidants like carotenoids, chlorophyll, and polyphenols, this nutritious plant also contains a significant amount of minerals like calcium and iron. It also has healing compounds, including terpenes, quercetin, apigenin, luteolin, and rutin.
Not only that, nettles have antimicrobial activity, antihistamine benefits, anti-inflammatory benefits, and pain relieving properties among many other benefits. We will dive into these benefits further.
Nettles are Nutritious
When eaten as a vegetable, nettles are a major source of nutrition for many cultures in the world.
Nettles root and leaves are good sources of the following nutrients:
% Daily Value per 100 g. Also provides 2.4 g protein and 2011 IU provitamin A (carotenoids) per 100 g.
Nettles are Anti-Inflammatory
Beyond the nutrients that nettles have, the natural anti-inflammatory compounds it contains may reduce the risk of many chronic diseases.
Nettles reduce the production of inflammatory compounds including:
- COX-1
- COX-2
- NF-kB
- Platelet activating factor
- IL-1
- IL-2
- Tumor necrosis factor (TNF)
By reducing inflammation, nettles are helpful in so many ways. Let’s take a closer look at the benefits of nettles throughout the whole body.
The Science Connection
Why Reducing Inflammation Is the Key to Allergy Relief
The anti-inflammatory and anti-allergy benefits of nettles are not two separate effects — they are two expressions of the same underlying mechanism. When nettles suppress inflammatory pathways like COX-1, COX-2, and NF-kB, they simultaneously reduce the conditions that trigger histamine release. Research now shows that nettles work against seasonal allergies through two primary pathways: blocking histamine H1 receptors (the same receptors targeted by antihistamine medications) and inhibiting tryptase, an enzyme that activates mast cells to release histamine.
This dual action helps explain why some people — myself included — notice relief that feels both rapid and sustained, rather than the temporary masking effect of conventional antihistamines.
Nettles Reduce Pain Naturally
Because of the anti-inflammatory effects of nettles, they are used in treatment of acute inflammatory conditions and chronic inflammatory conditions like rheumatoid arthritis. It also likely helps reduce osteoarthritis pain as well. Even better, one study showed that using nettles supplements decreased the need for pain medications in people with osteoarthritis. The antioxidants in nettles like rutin, quercetin, and terpenes also decrease inflammation in the body.
My Personal Experience
How Nettles Eased My Bunion Pain
I’ve also seen nettles do something I didn’t expect: ease joint pain. I’ve been following my own MRT/LEAP protocol for over six months now, and a few days ago I added nettles back in as one of the newer pieces of that plan. Within days, the bunion pain in my foot — something I’ve lived with and mostly just managed around — was noticeably better. My joints overall felt looser, almost younger. I can’t say for certain it was the nettles alone, since it came on the heels of months of dietary work, but the timing was too close to ignore, and it’s consistent with the anti-inflammatory mechanisms above.
— Heidi Moretti, MS, RD | The Healthy RD
Nettles Help Allergy Symptoms
Long used to reduce allergy symptoms, nettles help to reduce histamine levels in the body by reducing inflammation, stabilizing mast cells which release histamine, and reducing histamine production.
In fact, one clinical study showed that nettles reduced allergy symptoms and even reduced the allergic eosinophil immune cell counts in the nasal cavities of people with allergy symptoms.
New Research — 2024
A computational study published in Molecules (2024) identified 277 bioactive compounds in stinging nettle and mapped how they interact with five key receptors involved in allergic rhinitis — including histamine and bradykinin receptors. This research provides a molecular explanation for why nettles are so effective at reducing seasonal allergy symptoms, and why the relief can feel more comprehensive than that of single-target antihistamine medications.
Why Reducing Inflammation Is the Key to Allergy Relief
The anti-inflammatory and anti-allergy benefits of nettles are not two separate effects — they are two expressions of the same underlying mechanism. When nettles suppress inflammatory pathways like COX-1, COX-2, and NF-kB, they simultaneously reduce the conditions that trigger histamine release. Research now shows that nettles work against seasonal allergies through two primary pathways: blocking histamine H1 receptors (the same receptors targeted by antihistamine medications) and inhibiting tryptase, an enzyme that activates mast cells to release histamine. Nettles are one of several natural mast cell stabilizers worth understanding if histamine issues show up beyond just seasonal allergies for you.
This dual action helps explain why some people — myself included — notice relief that feels both rapid and sustained, rather than the temporary masking effect of conventional antihistamines.
Nettles are one of the best supplements for allergies to use to reduce seasonal allergies, and many reviews demonstrate a significant reduction in overall allergy symptoms when using nettles supplements. Using nettles supplements has helped many people — including me — ditch conventional antihistamines, which carry a number of long-term side effects.
How Quickly Can You Expect Relief?
One of the most common questions I hear from clients is: “How long before I notice a difference?” Based on clinical evidence and my own experience, here is a realistic timeline:
| Timeframe | What to Expect | Evidence |
|---|---|---|
| Days 1–3 | Initial reduction in nasal inflammation and sinus dripping; some people notice reduced sneezing | Mechanism-based (anti-inflammatory action) |
| Week 1 | Meaningful symptom improvement for many users | Randomized double-blind clinical trial |
| Weeks 2–4 | Sustained reduction in histamine and eosinophil counts; most people feel significant relief | Clinical study, nasal eosinophil reduction |
Starting nettles 2–4 weeks before your peak allergy season may produce even better results. I begin taking mine in late February each year.
My Personal Experience
How Nettles Changed My Allergy Season — For Good
As a dietitian, I’ve recommended nettles to hundreds of clients over the years. I use freeze-dried nettles supplements every spring, and within the first day I always notice a quick improvement in allergy symptoms. The sinus pressure that used to derail my days significantly eased. With nettles, I feel like I get ahead of my allergies rather than just managing them reactively.
What surprised me most was how quickly the inflammation calmed down. I’ve always known the science — nettles inhibit those inflammatory pathways — but experiencing that shift firsthand gave me a new appreciation for how powerfully food-based medicine can work. Now nettles is a non-negotiable part of my spring routine, and I recommend it to anyone who asks me about a natural approach to seasonal allergies. Speaking of inflammation, one of the best ways to dampen inflammations and allergies is to get to the root cause-which can be food sensitivities. By testing for food sensitivities using the MRT test, you can often minimize allergy symptoms in the first place.
— Heidi Moretti, MS, RD | The Healthy RD
Nettles Support Healthy Immune Function
Not surprisingly, nettles are also good for immune health. This is because it is nutritious and also reduces viral replication and viral attachment to cells.
The seeds of nettles also have strong antibacterial activity.
Historically, people used nettles to reduce the risk of infections, especially urinary tract infections.
Early research shows that nettles increase immune function and immune cell activity.
Nettles Reduce Blood Pressure
As a natural diuretic, nettles help to reduce blood pressure levels.
It also does so by increasing nitric oxide levels according to some research. This compound helps relax the blood vessels and reduce blood pressure.
More nettles means better blood pressure-higher doses work more effectively at bringing both systolic blood pressure and diastolic blood pressure levels down.
Nettles Helps People With Diabetes
Rich in antioxidants and nutrients, it is no surprise that nettles is a healthy plant for people with diabetes. Some people notice improvements in glucose control when using nettles leaf.
Research shows that in people with Type 2 diabetes, using nettles supplements 3 times daily 500 mg each improves both post meal glucose and hemoglobin A1C without any negative side effects.
A review of 8 clinical trials concluded that nettles reduce fasting blood glucose levels.
Nettles Help the Urinary Tract
Not only does nettles improve blood pressure, it helps with urinary tract health in both men and women. It may do so by helping to clear toxins and fight harmful bacteria in the urinary tract. Traditional uses of nettles include women’s and men’s urinary health.
Using nettles may also reduce the chances of getting kidney stones too.
Nettles Help Promote a Healthy Prostate
Nettles reduce the symptoms of benign prostatic hyperplasia (BPH) according to a double-blind clinical study.
Other research also demonstrates a benefit of nettles on prostate symptom relief. Using nettles even increases urinary flow rate in men with BPH.
Importantly, research shows that using nettles extract is safe and effective long term for lower urinary tract symptoms in men.
When combined with saw palmetto, nettles is as effective as conventional treatment for these BPH symptoms like nighttime urination including tamsulosin and finasteride.
Last but not least, nettles may help reduce the growth of prostate cancer cells, but more research is needed.
Nettles Reduces Colitis Symptoms
A number of research studies now show that nettles herbal supplements help improve gut health and reduce the symptoms of inflammatory bowel disease including ulcerative colitis.
In a double-blind placebo controlled trial, nettles supplements reduced symptoms of ulcerative colitis, reduced inflammation markers, and improved quality of life in people suffering from this condition.
Several animal studies also demonstrate that nettles reduce the inflammation that occurs in colitis.
Nettles Reduces Bloating
Long used for a diuretic effect, nettles also have a natriuretic effect, meaning that it may help with heart and kidney function.
Its actions are similar to prescription diuretics like lasix according to one animal study.
By increasing urine output, nettles may reduce symptoms of bloating during the premenstrual period for women.
Nettles Helps Reduce Menopause Symptoms
Importantly, nettles also reduce hot flashes effectively in women after menopause. This is important because hot flashes are not only uncomfortable, they are a risk factor for heart disease in women.
One study even found that using topical nettles cream helped improve menopause symptoms by reducing vaginal atrophy and vaginal dryness.
Traditional use of nettles also suggests that this herb can help with reducing excess menstrual bleeding.
Nettles for Skin Healing
Topical nettles cream helps heal skin burn wounds better than the use of silver sulfadiazine or vaseline.
What I Look For in a Nettles Supplement
As an RD who uses nettles personally, here are the factors I consider most important:
- Freeze-dried leaf, not just dried. Freeze-drying preserves the active antihistamine compounds far better than standard drying methods. Look for this on the label.
- Dose: 600–1500 mg daily. This is the evidence-supported range. I personally use 1000 mg split into two doses during peak allergy season.
- Start before your season. Beginning 2–4 weeks before your typical allergy window gives the anti-inflammatory effects time to build up.
- Third-party tested. Look for USP, NSF, or Informed Sport certification to ensure purity and accurate dosing.
How to Use Nettles
Nettles leaf and nettles root are available as supplements in capsule form or in tincture form. Another popular way to use nettles is to drink nettles tea or to use nettles as a vegetable in soups and stews. Typical doses for nettles supplements are between 600-1500 mg per day.
When to Avoid Nettles
If you have allergic reactions to nettles supplements, you should avoid using this herb. Don’t use nettles if you are pregnant.
Nettles FAQ
How long does it take for nettles to relieve allergy symptoms?
Most people notice initial improvement in nasal inflammation within 1–3 days. Meaningful symptom relief typically builds over the first week, with sustained reduction in histamine and eosinophil counts by weeks 2–4.
Can nettles help joint pain, not just allergies?
Yes. Nettles reduce inflammatory compounds like COX-1, COX-2, and NF-kB, which is the same mechanism behind their pain-relieving effects in conditions like osteoarthritis and rheumatoid arthritis. I’ve personally noticed less bunion-related foot pain after adding nettles back into my own MRT/LEAP protocol.
What’s the typical dose of nettles supplements?
Most research supports 600–1500 mg daily. I personally use 1000 mg split into two doses during peak allergy season.
Are nettles safe to take long-term?
Research supports safe long-term use for conditions like urinary tract symptoms and BPH. As with any supplement, avoid nettles if you’re pregnant or have a known allergic reaction to the plant.
Should I take nettles before allergy season starts?
Yes — starting 2–4 weeks before your typical allergy window gives the anti-inflammatory effects time to build up. I begin taking mine in late February each year.
