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There’s no shortage of products that promise mind-blowing sex and explosive orgasms. One male enhancement supplement is Semenax, which supposedly boosts semen volume and ups the intensity of your orgasms.
But does it actually work? Can a natural supplement really transform your sex life? While Semenax advertises it can, the science so far is lacking. Here’s what you need to know.
What is Semenax?
Semenax is a male enhancement supplement that claims to increase semen volume and produce better orgasms. Leading Edge Health, the company that manufactures Semenax, advertises that the product can boost semen volume by roughly 20%.
It contains 18 natural ingredients including vitamin E, amino acids (like L-arginine and L-lysine), plant extracts, and mineral-rich components like pumpkin seeds. Semenax is manufactured and sold online by Leading Edge Health. It is not sold in stores.
What is Semenax used for?
The ingredients in Semenax are supposed to “feed your reproductive system” by encouraging the glands linked to semen production and ejaculation (the seminal vesicles, prostate, and bulbourethral gland) to produce more fluid. This increase in semen production is said to offer greater control of your ejaculations, intensify orgasms, and boost sexual satisfaction for you and your partners.
One small unpublished study on the manufacturer’s website claims that Semenax increases the intensity of orgasms and produces more ejaculate than a placebo. Keep in mind that other than this study, there is no clinical trial data yet on Semenax to prove this (Vedic Lifesciences, 2012).
How long does it take Semenax to work?
Using Semenax regularly is said to increase semen production in as little as two weeks. Some online customer reviews report even faster results. Other positive reviews boast that their semen volume more than doubled after using Semenax.
What’s in Semenax?
So, what exactly is in Semenax that has the power to boost your semen volume? Let’s examine the evidence.
Maca comes from the root of a plant called Lepidium meyenii. It’s in the same vegetable family as broccoli, cauliflower, and kale.
Some research suggests that maca root can impact semen volume. One small study had nine men take maca for four months. Afterwards, the participants reported a larger amount of semen, higher sperm count, and better sperm motility (Gonzales, 2001).
Another study found that males who took maca for three months had slight increases in sperm production, semen volume, and sperm motility, while those taking placebo saw no change (Melinikovova, 2015).
L-arginine is an amino acid that your body uses to make nitric oxide, a chemical crucial for increasing blood flow to the penis and promoting erections.
Some research demonstrates that males with erectile dysfunction have low levels of L-arginine and suggests that supplementing it might improve symptoms. An analysis of 10 studies found evidence that L-arginine does help improve erectile dysfunction (Rhim, 2019; Barassi, 2017).
There is some evidence that L-arginine has a positive impact on semen volume, but the data is only from animal studies (Chen, 2018).
Horny goat weed
Epimedium sagittatum, commonly called horny goat weed, is an herb used in traditional Chinese medicine. It’s sometimes used as an aphrodisiac or found in supplements that treat ED. However, all of the current data comes from animal studies, so there isn’t much evidence it can enhance sexual function in humans (Cui, 2015).
Muira puama, or Ptychopetalum olacoides, is an extract from tree bark in the Amazon rainforest. Evidence shows that it can increase libido, which is why it’s added to some sexual enhancement supplements. However, there are no studies that link it to increased semen volume (Brunetti, 2020).
Pumpkin seeds and vitamin E
Some studies show supplementing with vitamin E and pumpkin seed oil improves semen quality. Again, the only evidence so far comes from animal studies (Lotfi, 2021).
Other ingredients Semenax contains include:
- Swedish flower pollen
- Avena sativa extract
- Sarsaparilla root
- Butea superba
- Cranberry extract
- Pine bark extract
- Hawthorne berry
- Zinc aspartate
- Catuaba bark
How to take Semenax
Leading Edge Health recommends taking two Semenax pills twice a day (four pills total). They suggests taking the supplement for two months before deciding if you’re satisfied with the results.
Pros and cons of Semenax
Semenax is made from natural ingredients and no serious side effects have been reported. Also, the product can be ordered online and delivered directly to your home. The company offers a money-back guarantee if you’re not satisfied with your results.
However, there are some disadvantages. One is cost. A one-month supply of Semenax costs up to $80––although the company does offer a discount if you purchase in bulk. You would need a minimum one-month supply anyway as they claim it takes a few weeks to start working.
In addition, there is limited evidence that Semenax works. Although online reviews are generally positive, there are no published clinical studies demonstrating its safety and effectiveness. And since its components are natural supplements, most Semenax ingredients do not have U.S. Food and Drug Administration (FDA) regulations or guidelines for dosing.
Other options for ED
If your erections aren’t as hard or don’t last for as long as you’d like, there are plenty of treatment options available. Medications like Viagra (generic name sildenafil; see Important Safety Information) and Cialis (generic name tadalafil; see Important Safety Information) are FDA-approved for the treatment of erectile dysfunction.
Though an all-natural male enhancement pill that boosts semen volume and enhances orgasms sounds promising, there’s not much proof that it works. It may be helpful to talk to a healthcare professional before starting supplements like this, especially if you have any underlying health conditions or are taking other medications.
- Barassi, A., Corsi Romanelli, M. M., Pezzilli, R., Damele, C. A., Vaccalluzzo, L., Goi, G., et al. (2017). Levels of l-arginine and l-citrulline in patients with erectile dysfunction of different etiology. Andrology, 5(2), 256–261. doi:10.1111/andr.12293. Retrieved from https://pubmed.ncbi.nlm.nih.gov/28178400/
- Chen, J. Q., Li, Y. S., Li, Z. J., Lu, H. X., Zhu, P. Q., & Li, C. M. (2018). Dietary l-arginine supplementation improves semen quality and libido of boars under high ambient temperature. Animal: An International Journal of Animal Bioscience, 12(8), 1611–1620. doi:10.1017/S1751731117003147. Retrieved from https://pubmed.ncbi.nlm.nih.gov/29198215/
- Cooper, T. G., Noonan, E., von Eckardstein, S., Auger, J., Baker, H. W., Behre, H. M., et al. (2010). World Health Organization reference values for human semen characteristics. Human Reproduction Update, 16(3), 231–245. doi:10.1093/humupd/dmp048. Retrieved from https://pubmed.ncbi.nlm.nih.gov/19934213/
- Cui, T., Kovell, R. C., Brooks, D. C., & Terlecki, R. P. (2015). A Urologist’s Guide to Ingredients Found in Top-Selling Nutraceuticals for Men’s Sexual Health. The Journal of Sexual Medicine, 12(11), 2105–2117. doi:10.1111/jsm.13013. Retrieved from https://pubmed.ncbi.nlm.nih.gov/26531010/
- Durg, S., Shivaram, S. B., & Bavage, S. (2018). Withania somnifera (Indian ginseng) in male infertility: An evidence-based systematic review and meta-analysis. Phytomedicine : International Journal of Phytotherapy and Phytopharmacology, 50, 247–256. doi:10.1016/j.phymed.2017.11.011. Retrieved from https://pubmed.ncbi.nlm.nih.gov/30466985/
- Gonzales, G. F., Cordova, A., Gonzales, C., Chung, A., Vega, K., & Villena, A. (2001). Lepidium meyenii (Maca) improved semen parameters in adult men. Asian Journal of Andrology, 3(4), 301–303. Retrieved from https://pubmed.ncbi.nlm.nih.gov/11753476/
- Lotfi, S., Fakhraei, J., & Mansoori Yarahmadi, H. (2021). Dietary supplementation of pumpkin seed oil and sunflower oil along with vitamin E improves sperm characteristics and reproductive hormones in roosters. Poultry Science, 100(9), 101289. doi:10.1016/j.psj.2021.101289. Retrieved from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8322462/
- Melnikovova, I., Fait, T., Kolarova, M., Fernandez, E. C., & Milella, L. (2015). Effect of Lepidium meyenii Walp. on Semen Parameters and Serum Hormone Levels in Healthy Adult Men: A Double-Blind, Randomized, Placebo-Controlled Pilot Study. Evidence-Based Complementary and Alternative Medicine. doi:10.1155/2015/324369. Retrieved from https://pubmed.ncbi.nlm.nih.gov/26421049/
- Nguyen, S., Rajfer, J., & Shaheen, M. (2018). Safety and efficacy of daily Revactin® in men with erectile dysfunction: a 3-month pilot study. Translational Andrology and Urology, 7(2), 266–273. doi:10.21037/tau.2018.03.22. Retrieved from https://pubmed.ncbi.nlm.nih.gov/29732286/
- Rhim, H. C., Kim, M. S., Park, Y. J., Choi, W. S., Park, H. K., Kim, H. G., et al. (2019). The Potential Role of Arginine Supplements on Erectile Dysfunction: A Systemic Review and Meta-Analysis. The Journal of Sexual Medicine, 16(2), 223–234. doi:10.1016/j.jsxm.2018.12.002. Retrieved from https://pubmed.ncbi.nlm.nih.gov/30770070/
- Shindel, A. W., Xin, Z. C., Lin, G., Fandel, T. M., Huang, Y. C., Banie, L., et al. (2010). Erectogenic and neurotrophic effects of icariin, a purified extract of horny goat weed (Epimedium spp.) in vitro and in vivo. The Journal of Sexual Medicine, 7(4 Pt 1), 1518–1528. doi:10.1111/j.1743-6109.2009.01699.x. Retrieved from https://pubmed.ncbi.nlm.nih.gov/20141584/
- Vedic Lifesciences Pvt Ltd. (2012). Effect of Semenax Capsules on Semen Characteristics. Retrieved on Nov. 5, 2021 from http://www.semenax.com/wp-content/uploads/2019/05/Semenax_CSR_v1_1-Oct-2012.pdf
Yael Cooperman is a physician and works as a Senior Manager, Medical Content & Education at Ro.