Spartagen XT Review

Spartagen XT

Spartagen XT is marketed as a testosterone booster and libido enhancer. The formula is relatively simple, with just five primary ingredients, most of which have been shown to encourage healthy testosterone levels…


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Spartagen XT is marketed by Edge Bioactives as a testosterone booster and libido enhancer. The formula is relatively simple, with just five primary ingredients, most of which have been shown to encourage healthy testosterone levels…[Skip to the Bottom Line]


Eurycoma Longifolia, also known as Tongkat Ali has been shown, in various studies, to increase Testosterone in male rats, but the only human studies that exist have tested the effects of Tongkat Ali in infertile men, not healthy men.

A 2010 study published in the “Asian Journal of Andrology” found that supplementation with 200mg of an extract of Eurycoma Longifolia significantly improved various indications of male fertility (in humans), though the mechanism of action was unknown.

A 2012 study published in “Andrologia: Volume 44” (the same researchers from the above mentioned human study) found that men suffering from Hypogonadism (diminishing functionality of the gonads) who were treated with a 200 mg daily dose of Eurycoma longifolia extract reached normal Testosterone levels after a 30 day period. To be fair, at the start of the study about 35% of the men were showing normal Testosterone levels, and at the end about 90% showed normal levels. Still, 35% to 90% is clearly statistically significant.

Spartagen XT contains an undisclosed dose of Tongkat Ali per serving, but given a 290mg proprietary blend of which it is the first ingredient listed, we’d estimate anywhere from 150-200mg.


Tribulus has a well-documented history of use as an aphrodisiac and libido enhancer. Over the years, it has also gained a reputation as a Testosterone-booster, although recent research indicates otherwise.

A 2005 study, published in the “Journal of Ethnopharamcology” found that 200mg daily (60% saponin content) had no effect on Testosterone in healthy men.

These results were replicated in a 2007 study in which 450mg of Tribulus extract daily failed to influence Testosterone levels in male athletes.

Even a 2012 study, this time testing the effects of 6g of Tribulus extract on infertile men, found a less than significant trend towards increased Testosterone.

As a libido enhancer, Tribulus may provide the illusion of increased Testosterone but there is absolutely no evidence to suggest it will increase Testosterone. In fact, there is large amount of evidence to the con

trary. Spartagen XT contains an undisclosed amount of Tribulus, but given it’s the second ingredient in a 290mg proprietary blend, there can’t be more than 140mg of so, and we suspect even less.

Korean (Asian) Ginseng:

Asian Ginseng has been traditionally used, not as a direct Testosterone booster, but as an erectile aid.

A 2002 study, published “The Journal of Urology” found that subjects suffering from erectile dysfunction who consumed 900mg of Korean Ginseng extract three times daily for 8 weeks experienced significant improvement. The researchers in this study concluded that “Korean red ginseng can be an effective alternative for treating male erectile dysfunction.

These findings were corroborated by a 2007 study which found that subjects (also with erectile dysfunction) who consumed 1000mg of Red Ginseng twice daily experienced all around significant improvement.

Although Asian Ginseng is certainly effective, the dose present in Spartagen XT is much lower than what was used in the above-mentioned studies.


Maca (Lepidium Meyenii) is a relative of Broccoli, indigenous to Peru, which has historically been used as an aphrodisiac. While frequently included in products aimed at increasing Testosterone, research has confirmed that the aphrodisiac effects of Maca are not caused by an elevation in Testosterone, nor does it have any significant impact on any hormones.

A 2002 study, published in “Andrologia”, found that Maca supplementation increased sexual desires, but that this effect was independent of Testosterone, which stayed the same. These findings were replicated in a 2003 study, published in the “Journal of Endrocrinology”, in which supplementation with 1.5 and 3 grams of Maca extract for 12 weeks had no influence on Testosterone levels in healthy men.

In several human studies, Maca has demonstrated a clear aphrodisiac effect when at least 1.5 grams is consumed. A 2009 study using 2400mg of Maca showed “a small but significant effect of Maca supplementation on subjective perception of general and sexual well-being in adult patients with mild ED.” A separate 2009 pilot study, this time investigating a potential effect on physical performance, found that Maca supplementation effectively improved physical performance (cycling) in trained male cyclists, while simultaneously increasing sexual desires.

Unfortunately, the amount of Maca present in one serving of Spartagen XT is pretty negligible compared to the 1.5g+ doses used in the above-mentioned studies.


Butea superba is a Thai herb which is alleged to have aphrodisiac/libido-enhancing properties, with a decent amount of research indicating it can effective. However, several studies have also looked at whether this herb can increase Testosterone levels in both animals and humans, and the results are inconsistent.

A 2012 study from “Andrologia” noted Testosterone increases of about 30% in rats given 50mg/kg daily for 60 days.

A 2003 study, published in the “Journal of Medicinal Food”, found that 20mg of Chrysin had no influence on Testosterone levels in healthy male subjects.

Chrysin has been studied in conjunction with other compounds but none of these results can be attributed entirely to Chrysin.

Ultimately, while Chrysin may increase Testosterone levels in mice, it is unreliable in humans so for now we’d still consider it a highly speculative addition to the Spartagen XT formula.


Spartagen XT contains a few effective libido enhancers and Testosterone “support” ingredients, but a few of these may be under-dosed by quite a bit. Individuals with abnormally low Testosterone levels are more likely to benefit from supplementation than those with healthy Testosterone levels, as none of the ingredients in Spartagen XT have been shown to boost Testosterone beyond the normal range (in humans).

[expand title=”REFERENCES” tag=”h5″]

  1. Gambelunghe, Cristiana, et al. “Effects of chrysin on urinary testosterone levels in human males.” Journal of medicinal food 6.4 (2003): 387-390.
  2. Ciftci, O., et al. “Beneficial effects of chrysin on the reproductive system of adult male rats.” Andrologia 44.3 (2012): 181-186.
  3. Cherdshewasart, Wichai, et al. “Androgen disruption and toxicity tests of< i> Butea superba Roxb., a traditional herb used for treatment of erectile dysfunction, in male rats.” Maturitas 60.2 (2008): 131-137.
  4. Malaivijitnond, S., et al. “Luteinizing hormone reduction by the male potency herb, Butea superba Roxb.” Brazilian Journal of Medical and Biological Research 43.9 (2010): 843-852.
  5. Tambi, M. I. B. M., M. K. Imran, and R. R. Henkel. “Standardised water‐soluble extract of Eurycoma longifolia, Tongkat ali, as testosterone booster for managing men with late‐onset hypogonadism?.” Andrologia 44.s1 (2012): 226-230.
  6. Ang, H. H., S. Ikeda, and E. K. Gan. “Evaluation of the potency activity of aphrodisiac in Eurycoma longifolia Jack.” Phytotherapy Research 15.5 (2001): 435-436.
  7. Zanoli, P., et al. “Influence of< i> Eurycoma longifolia on the copulatory activity of sexually sluggish and impotent male rats.” Journal of ethnopharmacology 126.2 (2009): 308-313.
  8. Ang, H. H., S. Ikeda, and E. K. Gan. “Evaluation of the potency activity of aphrodisiac in Eurycoma longifolia Jack.” Phytotherapy Research 15.5 (2001): 435-436.
  9. Tambi, Mohd Ismail Bin Mohd, and M. Kamarul Imran. “Eurycoma longifolia Jack in managing idiopathic male infertility.” Asian journal of andrology 12.3 (2010): 376-380.
  10. Bhat, Rajeev, and A. A. Karim. “Tongkat Ali (< i> Eurycoma longifolia Jack): A review on its ethnobotany and pharmacological importance.”Fitoterapia 81.7 (2010): 669-679.
  11. Rogerson, Shane, et al. “The effect of five weeks of Tribulus terrestris supplementation on muscle strength and body composition during preseason training in elite rugby league players.” The Journal of Strength & Conditioning Research 21.2 (2007): 348-353.
  12. Sellandi, Thirunavukkarasu M., Anup B. Thakar, and Madhav Singh Baghel. “Clinical study of Tribulus terrestris Linn. in Oligozoospermia: A double blind study.” Ayu 33.3 (2012): 356.
  13. Gauthaman, Kalamegam, and Adaikan P. Ganesan. “The hormonal effects of< i> Tribulus terrestris and its role in the management of male erectile dysfunction–an evaluation using primates, rabbit and rat.” Phytomedicine 15.1 (2008): 44-54.
  14. Gauthaman, K., P. G. Adaikan, and R. N. V. Prasad. “Aphrodisiac properties of< i> Tribulus Terrestris extract (Protodioscin) in normal and castrated rats.” Life Sciences 71.12 (2002): 1385-1396.
  15. Martino-Andrade, Anderson J., et al. “Effects of< i> Tribulus terrestris on endocrine sensitive organs in male and female Wistar rats.” Journal of ethnopharmacology 127.1 (2010): 165-170.
  16. Neychev, Vladimir Kostadinov, and Vanyo Ivano Mitev. “The aphrodisiac herb< i> Tribulus terrestris does not influence the androgen production in young men.” Journal of Ethnopharmacology 101.1 (2005): 319-323.
  17. Zenico, T., et al. “Subjective effects of Lepidium meyenii (Maca) extract on well‐being and sexual performances in patients with mild erectile dysfunction: a randomised, double‐blind clinical trial.” Andrologia 41.2 (2009): 95-99.
  18. Stone, Mark, et al. “A pilot investigation into the effect of maca supplementation on physical activity and sexual desire in sportsmen.” Journal of ethnopharmacology 126.3 (2009): 574-576.
  19. Gonzales, G. F., et al. “Effect of Lepidium meyenii (MACA) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men.”andrologia 34.6 (2002): 367-372.
  20. Gonzales, G. F., et al. “Effect of Lepidium meyenii (Maca), a root with aphrodisiac and fertility-enhancing properties, on serum reproductive hormone levels in adult healthy men.” Journal of Endocrinology 176.1 (2003): 163-168.
  21. Hong, Bumsik, et al. “A double-blind crossover study evaluating the efficacy of Korean red ginseng in patients with erectile dysfunction: a preliminary report.”The Journal of urology 168.5 (2002): 2070-2073.
  22. De Andrade, Enrico, et al. “Study of the efficacy of Korean Red Ginseng in the treatment of erectile dysfunction.” Asian journal of andrology 9.2 (2007): 241-244.
  23. Jang, Dai‐Ja, et al. “Red ginseng for treating erectile dysfunction: a systematic review.” British journal of clinical pharmacology 66.4 (2008): 444-450.

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