Semenax Review: Ingredients, Clinical Study, Results and Where to Buy

Short answer

Semenax is a capsule supplement from Leading Edge Health, marketed for semen volume and climax intensity. Its label lists 18 ingredients with exact doses, led by Butea superba, L-carnitine and maca, taken as 4 capsules a day. The maker says it is “clinically proven to increase semen volume by 20%”. We read the trial behind that claim: 63 men completed two months, average volume on Semenax rose from 2.49 mL to 2.97 mL while the placebo group fell slightly, and half the Semenax group had a rise of 20% or more against 16% on placebo. The trial was funded by the manufacturer, it is small, and it has not been repeated. Semenax is not a fertility treatment. If you have low semen volume, pain, or trouble conceiving, see a doctor first.

Semenax key facts

Maker	Leading Edge Health (Victoria, BC, Canada)
Form	Capsules (the maker’s page calls them pills)
Dose per label	4 capsules daily, best taken with meals
Capsules per bottle	120
Days per bottle	30 at the label dose
Ingredients with doses disclosed	Yes, all 18 on the label
Guarantee	67 days, empty containers accepted, per the maker
Price	$59.00 per bottle listed on 27 September 2026, with a temporary sale price shown (see below)
Study status	One manufacturer-funded randomized trial, registered in 2011, published in 2022 outside PubMed

What is Semenax?

Leading Edge Health describes Semenax on its product page as a “100% natural semen volumizing formula” made with 18 extracts. The US label in the NIH Dietary Supplement Label Database (label 336130, entered 22 August 2025) describes it as a dietary supplement “for male climax intensity”. An earlier entry, label 272202 from August 2022, lists the same formula.

The label gives a US inquiries address (c/o 100 Fidelitone Way, Elizabethton, TN 37643), carries an authenticity code seal, and says the product “is not intended to affect or treat any medical condition”.

Semenax ingredients: full dose table

Most Semenax reviews list the ingredient names only. The label gives the amount of each one, so here is the complete list per serving of 4 capsules, from NIH DSLD label 336130:

Ingredient	Amount per 4 capsules
Vitamin E	60 IU
Zinc (as zinc aspartate)	30 mg
Butea superba	500 mg
L-carnitine	500 mg
Maca	400 mg
Pine bark extract	300 mg
L-arginine HCl	250 mg
L-lysine	250 mg
Catuaba	200 mg
Epimedium sagittatum (horny goat weed)	150 mg
Muira puama	100 mg
Hawthorn	50 mg
Cranberry seed extract	50 mg
Tribulus terrestris	50 mg
Avena sativa seed extract	50 mg
Sarsaparilla	50 mg
Swedish flower (pollen)	50 mg
Pumpkin	30 mg

That is about 3 grams of ingredients a day. The published trial lists the same amounts, except vitamin E at 120 IU.

Does Semenax work? The clinical study

Is the Semenax study published?

Yes, but not where most medical research is indexed. We searched PubMed and Europe PMC for “Semenax” and found nothing. A web search led us to the paper, “Effect of a Polyherbal Dietary Supplement on Semen Characteristics: A Randomized, Double-Blind Placebo-Controlled Clinical Trial”, published in May 2022 in the Journal of Clinical Nutrition & Dietetics (iMedPub, volume 8, issue 4). A full-text copy is also on Zenodo. We found no listing for this journal in the NLM catalog, and the DOI printed on the paper did not resolve when we tried it on 27 September 2026. The article lists about one month between submission and publication.

The paper names the product as Semenax and gives the trial registration number CTRI/2011/09/001995 (Clinical Trials Registry, India). That fits the maker’s description of a 2011 study.

How was the trial run?

• Who took part: 78 men aged 30 to 60 at six clinics in Maharashtra, India, were randomized. All had low or perceived low semen volume, and the entry criteria also required some degree of erection problems (an IIEF erectile function score under 26).
• Groups: 41 men on Semenax, 37 on identical-looking placebo capsules, for two months.
• Who finished: 63 men (32 on Semenax, 31 on placebo) were analysed for results. This is the “63 men” the maker’s page mentions.
• Funding: the paper states the study was funded by Leading Edge Health. One author is a Leading Edge Health executive, and the other two work for Vedic Lifesciences, the contract research company that ran it.

What did it find?

Result	Semenax	Placebo
Average semen volume at start	2.49 mL	2.64 mL
Average semen volume at day 60	2.97 mL	2.43 mL
Average change	+0.49 mL (+19.67%)	-0.21 mL (-8%)
Men with a rise of 20% or more	16 of 32 (50%)	5 of 31 (16%)
Men reporting better orgasm quality	65.63%	41.9%

The difference between groups in volume change was statistically significant. That is where the maker’s “20%” figure comes from.

What are the limits?

• The rise within the Semenax group on its own was not statistically significant (the paper reports p = 0.14). The group difference was helped by the placebo group’s volumes falling.
• In the subgroup of men who started with low volume, the difference from placebo was not statistically significant. The effect was clearer in men who started in the normal range.
• Erection scores improved in both groups, so there is no shown erection benefit over placebo.
• It is one small, short, maker-funded trial that no independent group has repeated.
• The paper’s own dose wording is unclear. Its product table says “4 capsules two times a day”, while elsewhere it says the dose was equivalent to four commercial capsules, the same as the marketed daily dose.

The maker’s quote that “Semenax was superior to placebo in improving ejaculate volume and the intensity of orgasm” matches the paper’s conclusion, but the evidence is weaker than “clinically proven” suggests.

For context, the same research company ran a trial of VigRX Plus, another Leading Edge Health product, which was published in a PubMed-indexed journal (Shah et al., 2012, PubMed 22978405). We found no equivalent listing for Semenax.

What does the evidence say about the main ingredients?

These studies test single ingredients and do not show that Semenax works.

• Zinc, 30 mg: a large US trial in JAMA (2020) gave 2,370 men 30 mg of zinc plus 5 mg of folic acid, or placebo, for six months. Semen volume, sperm quality and live birth rates did not improve, and stomach symptoms were more common on the supplement. That is the same zinc dose as Semenax.
• L-carnitine and other antioxidants: a 2022 Cochrane review of 90 trials in subfertile men found only low to very low certainty evidence that antioxidants may improve pregnancy rates, and called the evidence inconclusive.
• Maca, 400 mg: a systematic review found “limited evidence” for sexual function from four small trials. A 2022 meta-analysis found unclear effects on semen quality.
• Pine bark extract, 300 mg: a small non-randomized study of 19 subfertile men taking 200 mg of Pycnogenol for 90 days reported better sperm shape. It did not measure volume and had no placebo group.
• Butea superba, 500 mg: a small Thai trial in men with erection problems reported benefits and no apparent toxicity. Human evidence remains thin.
• Tribulus and horny goat weed: Operation Supplement Safety, run for the US Department of Defense, says tribulus trials in men are mixed and there is a lack of human data for horny goat weed.

Semenax side effects: is it safe?

The maker’s FAQ says Semenax has “zero known adverse side effects” and is “100% safe”. Those are the manufacturer’s words. Its own trial recorded 15 adverse events, all mild or moderate. Five were judged probably related to the capsules (hyperacidity, abdominal pain and bloating) and one headache possibly related. No serious events were reported.

Points to check with a doctor or pharmacist:

• Zinc: the tolerable upper intake level for adults is 40 mg a day from food and supplements combined, set to prevent copper deficiency, according to the Linus Pauling Institute. Semenax gives 30 mg, and the adult male RDA is 11 mg (MedlinePlus). Adding a multivitamin or zinc lozenges could take you over the limit.
• Butea superba: in a 90-day rat study, high doses lowered testosterone and changed blood chemistry. The authors urged awareness of overdose risk. This is animal data, but it is the largest ingredient in Semenax.
• Tribulus: OPSS notes a few cases of severe liver and kidney damage after supplements containing tribulus, and says its safety is not fully understood.
• Horny goat weed: OPSS lists reported stomach upset, rapid or irregular heartbeat and mood changes, and advises talking to a healthcare provider first.
• L-arginine: a 2022 meta-analysis found arginine supplements lower blood pressure, mostly at 4 g a day or more. Semenax has 250 mg, but ask first if you take blood pressure medicine, nitrates or erection medicines.

The label itself advises consulting a health provider before starting.

When to see a doctor

The NHS advises seeing a GP about a persistent ejaculation problem, including producing no semen or only a small amount, and about blood in semen. Couples who have not conceived after a year of trying should see a GP, or sooner if they know of a possible fertility problem, according to the NHS infertility page. A supplement should not delay that check.

How do you take Semenax? The dose conflict

The US label says: “Recommended dosage: 4 Capsules daily. Best taken with meals.” The maker’s product page says “2 pills, twice, daily” in one place, and its FAQ says “Take 2 Semenax pills (recommended serving) every morning”. Two capsules a day would be half the label dose. We suggest following the label on your bottle, which is also what the bottle count assumes: 120 capsules last 30 days at 4 a day.

Semenax results: how long does it take?

The maker’s page promises “results starting in 2 weeks”. The trial measured semen volume at the start and after 60 days, so it does not show results at two weeks. Results varied widely: half the Semenax group did not reach a 20% rise.

Semenax before and after, and Reddit reviews

Forum posts and before-and-after claims are personal reports. Volume depends on time since last ejaculation, which is why the trial asked men to abstain for 2 to 3 days before each sample, so we do not use Reddit threads as evidence.

What is normal semen volume?

The WHO laboratory manual (6th edition, 2021) gives a lower reference limit of 1.4 mL, based on men whose partners conceived within a year, as summarised by the Manchester University NHS andrology lab. The median in that data is 3.0 mL. Our guide on how to increase semen volume covers what affects it.

Is Semenax a fertility treatment?

No. Volume is not the same as fertility. The trial did not test pregnancy, and it did not report a statistically significant improvement in sperm count over placebo. The label says the product is not intended to treat any medical condition. Our guide to semen volume vs fertility explains what matters more.

Semenax price and guarantee

On 27 September 2026 the Leading Edge Health page listed one bottle at $59.00, with packages of 1, 3 or 6 bottles. A flash-sale price of $29.50 per bottle was also shown that day. Treat that as a temporary promotion, because prices change. At $59 a bottle, the label dose costs about $1.97 a day.

The maker offers a 67-day money-back guarantee and says you can “send back the empty containers”. Read the guarantee terms at checkout before ordering.

Where to buy Semenax: Amazon, stores or the official site?

• Official site: the Semenax official site is the maker’s own shop, and the 67-day guarantee applies to orders placed there.
• Amazon: people search for Semenax on Amazon. We could not verify who the sellers are, and the maker’s guarantee applies to official-site orders.
• Near me and in stores: the maker sells Semenax online. We did not check local stores, so we cannot say whether any near you carry it.

Semenax vs “Semenex” (similar names)

Semenax, spelled with an “a”, is the Leading Edge Health product. Many people type “Semenex”, and several other websites use similar names and spellings. We do not use those sites as sources, and we cannot tell you what they sell. To be sure you get the product described here, with its guarantee, buy only through the official Semenax site and check the authenticity code on the pack.

Semenax vs VolumePills, and VigRX Plus

VolumePills is another supplement marketed for semen volume. See our VolumePills review and our Semenax vs VolumePills comparison.

Some people search for VigRX Plus and Semenax together. Both are made by Leading Edge Health, but VigRX Plus is marketed for erections and Semenax for volume and climax. We found no study of taking them together. If you consider it, compare both labels for shared ingredients and ask a pharmacist. Our VigRX Plus review covers that product.

Semenax FAQ

What are the ingredients in Semenax?

Eighteen. The largest per 4-capsule serving are Butea superba 500 mg, L-carnitine 500 mg, maca 400 mg and pine bark extract 300 mg, with zinc 30 mg and vitamin E 60 IU. See the full dose table above.

Does Semenax really work?

One manufacturer-funded trial of 63 men found a larger volume change than placebo over two months, and more men with a 20% rise. “Clinically proven” is the maker’s wording; we would call it preliminary evidence, because the effect was modest and has not been independently confirmed.

What are the side effects of Semenax?

In the trial, reported side effects linked to the capsules were mild stomach problems and one headache. Check with a doctor if you take other zinc supplements, have liver or kidney problems, or take blood pressure or erection medicines.

How many Semenax pills should I take a day?

The label says 4 capsules daily with meals. The maker’s page also mentions 2 pills, so follow the label on your bottle.

Is Semenax sold on Amazon?

Listings appear, but we could not verify the sellers. The guarantee applies to orders from the official site.

Is Semenex the same as Semenax?

“Semenex” is a common misspelling. Other sites use similar names, so buy only through the official Semenax site.

Is Semenax FDA approved?

No. Dietary supplements are not approved by the FDA before sale, and the label states its claims have not been evaluated by the FDA.

Verdict

Semenax is more open than most volume supplements: every dose is on the label, and a placebo-controlled trial exists. That trial is small, short, maker-funded and published outside the main medical databases, and the maker’s dose wording conflicts with the label. If you try it, buy through the official site, follow the 4-capsule label dose, count your total zinc and note the 67-day window. If low volume is new, painful or linked to trying for a baby, see a doctor instead.

Sources and editorial status

• NIH DSLD: Semenax label 336130 (2025) and label 272202 (2022): ingredients, doses, directions
• Leading Edge Health: Semenax product page: claims, study description, dose wording, guarantee, prices
• Journal of Clinical Nutrition & Dietetics 2022: Semenax trial and Zenodo full text
• VigRX Plus trial, BMC Complementary and Alternative Medicine 2012 (PubMed 22978405): context only
• WHO laboratory manual for semen, 6th edition (2021)
• Manchester University NHS: lower reference limits for semen
• Folic acid and zinc trial, JAMA 2020 (PubMed 31910279)
• Cochrane: Antioxidants for male subfertility (2022)
• Maca for sexual function, systematic review (2010) and maca and semen quality, meta-analysis (2022)
• Pine bark extract and sperm quality (2002)
• Butea superba clinical trial (2003) and rat toxicity study (2008)
• L-arginine and blood pressure meta-analysis (2022)
• OPSS: Tribulus terrestris and OPSS: Horny goat weed
• Linus Pauling Institute: Zinc and MedlinePlus: Zinc in diet
• NHS: Ejaculation problems and NHS: Infertility

Reviewed by the Mens Fitness editorial team. Sources checked 27 September 2026.