Horny Goat Weed Benefits: What's Known.

The short answer: Horny goat weed benefits rest mostly on centuries of traditional use as a tonic, and the human evidence is thin. NIH's LiverTox database says clinical studies of Epimedium extracts look promising for sexual satisfaction, but those effects "have not been proven in rigorous prospective controlled trials." Our Horny Goat Weed & Maca Capsules list 1,000 mg of Epimedium extract, standardized to 100 mg of icariins, per 2-capsule serving.

Key takeaways

• The herb sold as horny goat weed comes from Epimedium, a plant genus whose leaves and stems have gone into traditional tonics for centuries.
• The human trials LiverTox describes in detail tested multi-herb blends, and the one long trial in women used a purified flavonoid mix, so none isolates the plain herb.
• Over 6 months in 49 older men, a remedy containing Epimedium did no better than a comparison remedy on sexual-function scores or hormone levels.
• "Standardized to icariin" means a marker compound was measured, not that a product works or is higher quality.
• Epimedium is 1,000 of the 1,164.5 mg listed on our Supplement Facts panel per 2-capsule serving, about 86%.

Full disclosure: we sell a capsule whose first and heaviest ingredient is Epimedium, so we aren't neutral about this herb. That's why this page spends as long on what the trials didn't show as on what they did.

What is horny goat weed, and how was it used traditionally?

Horny goat weed is Epimedium, a genus of perennial plants in the barberry family that traditional medicine has used for centuries as a tonic and an aphrodisiac.

An aphrodisiac is something believed to stir sexual desire, and a tonic is taken to restore general vigor. Both words describe what people hoped for, not what anyone measured.

The NIH's LiverTox record for horny goat weed says the plant grows across Asia and in parts of Europe and Africa, and the extracts in supplements come from its leaves and stems. A 2011 review summarized there counts 52 species in the genus. Packaging may also call it yin yang huo, barrenwort, bishop's hat, fairy wings or rowdy lamb herb.

More than 200 compounds have been identified in the plant, LiverTox says, and the active ones are believed to be flavonoids such as icariin, icaritin and epimedin. Icariin is the one our label names.

What does research show about horny goat weed benefits?

Research on Epimedium benefits in people is thin: LiverTox calls the human results promising but unproven, and every trial we could read tested a blend or a purified mix.

Here's the evidence behind each claim:

So tradition carries most of the weight, and the human results can't separate Epimedium from the ingredients it was tested with.

One human test in LiverTox's reference notes ran 6 months in 49 older men. It compared a six-part remedy, including aged garlic extract, ginseng, velvet antler and Epimedium, with a traditional Japanese herbal remedy. The groups showed no difference in sexual-function scores or hormone levels. With another remedy standing in for a placebo and six ingredients in the mix, nothing here isolates horny goat weed.

Two reviews in the same notes are just as cautious. A 2015 guide for urologists found little evidence of any activity from horny goat weed, and a 2021 systematic review of popular men's supplements found some evidence but said it must be viewed with caution.

How much should tradition count? The NIH Office of Dietary Supplements (ODS) background fact sheet on botanical supplements says researchers can study a plant's history of use, test it on cells or animals, or study people. Studies in people give the most direct evidence, ODS adds, especially for multi-ingredient products, and rigorous human evidence is what Epimedium still lacks.

Are there horny goat weed benefits for women?

Horny goat weed benefits for women have little direct research: we found no controlled libido trial in women, and the one long trial in women measured bone density.

A 2016 review summarized in LiverTox's notes says horny goat weed has been used for libido in both men and women, and that icaritin, one of its flavonoids, appears to have estrogen-like effects. That's a reason to check with a clinician first if you've been told to avoid estrogen-like herbs.

The long trial asked a different question. A 24-month trial in the Journal of Bone and Mineral Research enrolled 100 healthy women 10 to 18 years past menopause, chosen because their spine bone density was already lower than average.

Half took a daily flavonoid mix of 60 mg of icariin, 15 mg of daidzein and 3 mg of genistein, and half took a placebo, with 300 mg of calcium for everyone. Bone density held roughly level on the mix and drifted down on placebo. Blood estradiol, the body's chief estrogen, didn't change in either group.

The flavonoids came from a different species, Epimedium brevicornum, rather than the E. sagittatum on our label, and 85 of the 100 women finished. We don't sell our capsule for bone health, and our label tells anyone pregnant or nursing to check with a physician before use.

How do horny goat weed capsules, gummies and tea differ?

Horny goat weed capsules, gummies, teas and liquid extracts differ mainly in how concentrated the plant is and how much the label can tell you.

ODS describes the basics: a tea is plant steeped in boiling water, an extract soaks it in water or alcohol and can be dried for capsules, and a tincture is an alcohol-and-water soak.

An extract capsule that states its milligrams and a marker figure gives you the most to compare across brands. A tea gives you the least, since your cup's strength depends on how you brew it.

What should a horny goat weed extract label tell you?

A useful horny goat weed extract label names the species and plant part, gives the extract's weight in milligrams, and says what, if anything, it's standardized to.

Check any bottle, ours included:

1. The species and part. Ours reads Epimedium sagittatum, aerial parts, meaning the parts above ground.
2. Extract or powder, in milligrams. Extracts are concentrated, so 500 mg of extract and 500 mg of ground leaf aren't the same amount of plant.
3. A marker figure, read with care. Our "100 mg of icariins" means icariin was measured in the 1,000 mg of extract. ODS says the ideal marker would be the compound behind a plant's effect, but for most botanicals those compounds aren't known.
4. An amount for every ingredient. A single blend total hides how much Epimedium you get.
5. The directions and caution, read before you buy.

ODS adds that "standardized" doesn't necessarily mean high quality. We look at that marker compound by itself in what icariin is.

What's in our Horny Goat Weed & Maca Capsules?

Betterly's Horny Goat Weed & Maca Capsules list nine ingredients per 2-capsule serving, led by 1,000 mg of Epimedium extract standardized to 100 mg of icariins.

The full panel, sorted by amount:

The rows add up to 1,164.5 mg, and Epimedium is 1,000 mg of that, about 86%. No Daily Value has been set for any row.

The honest limit: maca is on the front of the bottle, but at 62.5 mg it's a supporting player. The formula is meant to support normal libido and stamina, and by weight it's mostly Epimedium. If maca drew you in, read what maca's own small trials found first.

The label reads gluten free and lactose free. The capsule shell is gelatin, so it isn't vegetarian, and the other two inactive ingredients are rice flour and vegetable magnesium stearate. None of those three carries a weight on the panel, so they sit outside the 1,164.5 mg.

From our shop: Horny Goat Weed & Maca Capsules — 60 capsules make 30 servings of 2, and each serving lists nine ingredients led by 1,000 mg of Epimedium sagittatum extract.

How do you take horny goat weed capsules by the label?

The label for Betterly's Horny Goat Weed & Maca Capsules gives a single direction, 2 capsules once a day, and its caution adds "Do not exceed recommended dose."

"Once a day" means both capsules in one sitting, not one in the morning and one at night.

Nothing on the bottle picks a time of day, a meal or a glass size for you, so whichever you choose stays within its directions. With no caffeine among the nine rows, nothing on the panel asks you to plan around a stimulant.

Sixty capsules last 30 days, and each day's pair holds the full 1,000 mg of Epimedium extract, so there's no room for a second helping.

When can you skip horny goat weed?

You can skip horny goat weed if you need an herb proven in rigorous trials, want Epimedium on its own, or want a fuller dose of maca or tongkat ali.

• You want proof first. LiverTox says horny goat weed's human results haven't been proven in rigorous controlled trials, so if that's your bar, this herb doesn't clear it yet.
• You want Epimedium by itself. Our capsule adds eight other ingredients, and we don't sell a single-ingredient Epimedium product.
• You're really after maca. Our Organic Maca Root Capsules pack 1,500 mg of organic maca root, a mix of black, red and yellow, into each 2-capsule serving. That's 24 times the 62.5 mg here.
• You want tongkat ali or shilajit. Longjack and tongkat ali are both Eurycoma longifolia on our labels, and this capsule lists 1 mg. Our Shilajit & Tongkat Ali Capsules carry 100 mg of a 300:1 tongkat ali root extract in each 1-capsule serving, next to 400 mg of shilajit extract.

One more check: two tribulus-based formulas in our Targeted Support range also list Epimedium. Our side-effects guide adds up what stacking them brings.

From our shop: Shilajit & Tongkat Ali Capsules — a single vegan capsule a day pairs 400 mg of 30:1 shilajit extract with 100 mg apiece of tongkat ali, ashwagandha and sea moss extracts.

Who should get a healthcare provider's input before trying Epimedium?

Epimedium needs a healthcare provider's go-ahead first for anyone pregnant, nursing or under 18, and for anyone managing a medical condition, taking medicine or facing surgery.

Our label's caution covers all but medicines and surgery, which we add because a nine-ingredient formula gives a pharmacist more to cross-check than a single herb does. Our rundown of horny goat weed's cautions covers the finer points, including what to raise if a clinician has steered you away from estrogen-like herbs or asked you to cut back on phenylalanine.

One risk in this category never appears on an honest label. FDA keeps a running list of sexual enhancement and energy products found to contain hidden drug ingredients, some falsely advertised as dietary supplements or all-natural treatments, and says it covers only a small fraction of them. A reassuring phrase on any label, ours included, proves nothing alone. Our libido supplement safety checklist walks through the red flags.

FAQ: horny goat weed benefits

Does horny goat weed actually work?

Horny goat weed hasn't been shown to work in well-designed human trials. It has centuries of traditional use, and LiverTox calls human results on sexual satisfaction promising but unproven. The trials we found tested blends or purified flavonoid mixes, so they can't show what the herb does alone.

Is Epimedium the same as horny goat weed?

Yes, Epimedium and horny goat weed are the same plant group. Epimedium is the genus name, and horny goat weed is one of its common names, along with barrenwort and yin yang huo. The genus holds about 52 species, so a good label says which one it uses. Ours lists Epimedium sagittatum.

Does horny goat weed help with stamina?

Horny goat weed's stamina reputation comes from its long use as a traditional tonic, and we found no controlled human trial that measured stamina. Our label calls the formula an "Herbal Vitality & Stamina Blend," which describes what the blend is designed to support. If stamina is your main goal, treat it as an open question.

How long does horny goat weed take to work?

Horny goat weed has no established timeline. Our label gives a daily serving of 2 capsules and sets no time frame, and LiverTox doesn't link the herb to one either. Of the two blend trials in LiverTox's notes, one lasted 2 weeks and the other 6 months, and the flavonoid trial in women ran 24 months. Those lengths were chosen to fit each study's question, so they can't tell you when a change might show.

Can you take horny goat weed with other libido supplements?

Not without comparing labels first. LiverTox notes that horny goat weed is often combined with other botanicals, and some libido formulas tuck it inside a proprietary blend with no amount shown. Our capsule already supplies 1,000 mg of Epimedium extract per 2-capsule serving, and its label treats that serving as the daily ceiling. A second product listing Epimedium raises your daily total beyond what either label was written for, so show both panels to a pharmacist first.

Sources

• Horny Goat Weed, LiverTox (NCBI Bookshelf, National Institutes of Health)
• Botanical Dietary Supplements: Background Information for Consumers (NIH Office of Dietary Supplements)
• Zhang G, Qin L, Shi Y. J Bone Miner Res, 2007: 24-month randomized trial of Epimedium-derived flavonoids (PubMed abstract)
• Sexual Enhancement and Energy Product Notifications (U.S. Food and Drug Administration)

If this left you looking for somewhere to start, read horny goat weed extract with 100 mg of icariins per serving — its amounts per serving are listed on the page. For the practical questions this raises, how dosing, sourcing and subscriptions work is answered in one place.