Unmatched LONGEVITY TEST

Testosterone is more than just a hormone—it’s a cornerstone of male vitality and longevity, influencing everything from strength and stamina to mood, motivation, and metabolic health.

As testosterone levels naturally decline with age or due to lifestyle stressors, many individuals experience reduced vitality, performance, and drive, as well as declines in strength both physically and mentally.

That’s why supporting optimal testosterone levels isn’t just about muscle—it's about optimizing your energy, confidence, and overall well-being.

This comprehensive LONGEVITY TEST formula combines clinically studied ingredients like KSM-66® Ashwagandha and Furosap® Fenugreek to naturally boost testosterone and control cortisol, while PrimaVie® Shilajit and longjack promote energy, performance, and libido.

DIM and Apigenin help manage estrogen balance, and Boron Citrate to round out the formula supports free testosterone levels, creating a well-rounded approach to male hormone health.


KSM-6® Ashwagandha Extract (Root) (5% withanolides)

Withania somnifera Dunal, colloquially known as Winter Cherry or Indian Ginseng, is an herb that features prominently in the traditional Indian medicinal system of Ayurveda. Known as Ashwagandha in Ayurveda, Withania somnifera is a critical ingredient in various Ayurvedic tonics and tinctures prepared as a traditional remedy for the treatment of various ailments.

Recently identified as a potent adaptogenic and target for therapeutic applications, Ashwagandha has been the subject of numerous animal, pre-clinical, and clinical trials designed to examine its potential effects as an antioxidant, anti-carcinogenic, anxiolytic, antibacterial, antifungal, and immunomodulating compound. Ashwagandha’s broad therapeutic potential is hypothesized to be the result of its robust phytochemical profile, including a wide swath of alkaloids, sitoindosides, and the highly biologically active withanolide group. As the principally biologically active compounds within Ashwagandha, withanolides such as withanone, withaferine A, withanolides A, D, and G have been identified, isolated, and extensively studied in the various applications noted above.

In recognition of the potential physiological benefits of withanolides, Unmatched has selected KSM-66® to include in its test boosting and hormonal support formula. KSM-66® is a full-spectrum Ashwagandha extract, standardized for 5% withanolides – meaning that KSM-66® not only includes the full range of biologically active compounds within Ashwagandha, but also that it contains the highest currently available concentration of the principally active withanolides (5%).

The high concentrations of withanolides within KSM-66® has resulted in encouraging results in several humans, clinical trials – particularly considering many of these trials were conducted using the methodological gold standard of randomization, double-blind delivery, and placebo control. Amongst the most impressive results contained in these trials:

  • A 27.9% reduction in serum cortisol levels, measured over 60 days in a trial featuring 64 chronically stressed adults.
  • Statistically significant increases in endurance and stamina, as measured by VO2 max, in a clinical trial featuring 50 healthy, exercise-trained adults.
  • Increased measures of well-being as reported by self-assessment scales, included in both the clinical trials mentioned above.
  • Statistically significant increases in serum testosterone levels in a clinical trial featuring 68 infertile men.

Though each of these results is impressive, perhaps the most significant for is a study involving KSM66® and testosterone. 46 male patients were treated with KSM66® or placebo for 90 days, with measurements of serum hormone levels taken at the end of the 90-day treatment. The study established that 675mg of KSM-66® over 90 days had a statistically significant impact on healthy testosterone production in males, as compared to placebo. The same study also found an increase in healthy production of LH (luteinizing hormone), suggesting that KSM-66®’s method of action is at the pituitary level.

To put it the simplest way possible, cortisol’s chief functions involve either turning on, or shutting off, the very things we as fitness enthusiasts want to avoid or turn on, respectively!


Furosap® Fenugreek Extract (Trigonella foenum-graecum L.) (Seeds) (std. to 20% Protodioscins)

Fenugreek Extract (Trigonella foenum-graecum L.) is an herb traditionally used in cooking and holistic medicine that has gained popularity in the nutraceutical world for its proposed benefits on boosting testosterone levels. The seeds of the fenugreek plant contain several bioactive compounds, like protodioscins, saponins and 4-hyroxyisoleucine, which have been shown to influence hormone regulation, particularly testosterone. Fenugreek Extract exhibits several mechanisms of action for their testosterone boosting benefits:

  • Inhibition of enzymes that convert testosterone to estrogen and dihydrotestosterone.
  • Enhancing luteinizing hormone levels. Luteinizing can stimulate the testes to produce testosterone.
  • Inhibition of the enzyme aromatase. Aromatase can convert testosterone to estrogen so this inhibition can help maintain higher testosterone levels.

Furosap® is a patented extract derived from fenugreek (Trigonella foenum-graecum), specially formulated and standardized to contain a high concentration of protodioscin, a bioactive compound with powerful effects on testosterone production and male vitality. This fenugreek extract plays a vital role in stimulating the body’s natural production of testosterone, which plays an essential role in muscle health, energy levels, mood, and libido. For individuals looking to enhance physical and mental performance, Furosap® provides a natural, science-backed approach to supporting balanced testosterone levels.

One of the main benefits of Furosap® is its ability to increase free testosterone levels, which directly influences muscle strength and endurance. Protodioscin, the key compound found in Furosap®, acts by stimulating the release of luteinizing hormone (LH), which then signals the testes to produce testosterone. This increase in free testosterone can support better workout performance, improved muscle recovery, and overall superior physical resilience. Studies on Furosap® have shown that it can significantly elevate testosterone levels in men, offering support for physical activities and helping to combat age-related declines in strength and stamina.

In addition to supporting muscle and performance, Furosap® also benefits mental and sexual vitality. Testosterone plays a crucial role in mood, energy, and motivation, and Furosap® has been linked to improvements in these areas, contributing to a greater sense of well-being. The extract also has a positive impact on libido and reproductive health, making it a comprehensive choice for men seeking to enhance both physical and mental aspects of their lives.

A 2017 study examined the free and total testosterone levels, sperm profile, sexual health, mood, and mental alertness of participants who were administered Furosap® over a 12-week period. The results at the conclusion of the study showed:

  • Free testosterone levels improved up to 46% in 90% of the participants.
  • 85.4% of the participants showed improvements in sperm count.
  • A vast majority of the participants showed improvements in mental alertness and mood.
  • Cardiovascular health and libido were significantly improved.

Overall, Furosap®’s unique formulation and clinical backing make it a valuable ingredient for those wanting a natural and effective way to support testosterone and optimize vitality.

Another study published in the Journal of Sports and Health Science found that resistance-trained men who consumed fenugreek extract (500 mg/day) had significant increases in both total and bioavailable testosterone levels, along with improved body composition and strength. We can conclude that fenugreek extract can be a promising supplement for boosting testosterone levels and improving other health related parameters and quality of life. Clinical studies support its efficacy, particularly in increasing free testosterone and understanding how these results correlate to increased physical performance is a key component in our Unmatched LONGEVITY TEST.


Spilanthes Extract (Std. to 3.5% spilanthols)

Spilanthes is an advanced botanical supplement derived from the genus and species Spilanthes acmella, a plant that has benefits ranging from antioxidant and joint support to mood and mental clarity. It is also often utilized for its potential benefits in the enhancement of male vitality, particularly through its effects on testosterone levels. Recent scientific studies have begun to showcase how this powerful herb can support hormonal balance, making it a favorable choice for those looking to optimize their testosterone levels naturally.

One of the most compelling studies on Spilanthes acmella was published in the Journal of Ethnopharmacology. The research demonstrated that supplementation with Spilanthes acmella extract significantly increased testosterone levels in male rats. The study attributed this effect to the stimulation of the pituitary gland, which led to an increase in luteinizing hormone (LH) levels—a key hormone that signals the testes to produce more testosterone. This finding suggests that Spilanthes may have a similar effect in humans, promoting natural testosterone production and supporting male reproductive health.

Spilanthes is further known for its adaptogenic properties, which is essential for helping the body manage stress. This is a critical factor in maintaining healthy testosterone levels as chronic stress can lead to elevated levels of cortisol, a hormone that can negatively impact normal testosterone production. By modulating the body’s stress response, Spilanthes acmella can help to protect against cortisol's detrimental effects, thereby supporting sustained testosterone levels and overall hormonal balance.

The studied benefits of Spilanthes and healthy testosterone production/function are further supported by research into its antioxidant properties. One study showed that Spilanthes acmella possesses strong antioxidant activity, which can protect the Leydig cells in the testes from oxidative stress. The Leydig cells are responsible for producing testosterone, and their protection is crucial for maintaining optimal testosterone levels, particularly as men age.

Spilanthes can offer a clinically validated approach to naturally boosting testosterone levels and enhancing male vitality. Whether you’re looking to improve your physical performance, support reproductive health, or maintain hormonal balance, Spilanthes can provide a powerful, research-backed solution for men seeking to optimize their well-being.


PrimaVie® Purified Shilajit

PrimaVie® Shilajit is a premium, clinically studied form of shilajit, a potent substance traditionally used in Ayurvedic medicine for its wide-ranging health benefits. One of its most remarkable attributes is its ability to support healthy testosterone levels, making it an excellent natural supplement for men looking to enhance their vitality, physical performance, and overall well-being.

Shilajit, a resinous substance found in the mountains of the Himalayas, is rich in fulvic acid and over 85 trace minerals. These components contribute to its ability to support testosterone production and improve overall male reproductive health. A study published in Andrologia investigated the effects of shilajit supplementation on testosterone levels in healthy men. The results were quite promising: participants who took shilajit experienced a notable increase in total and free testosterone levels compared to those who received a placebo. This increase in testosterone was accompanied by improvements in overall energy levels, sexual health, and physical endurance, highlighting shilajit’s role as a natural testosterone booster.

Another study explored the effects of PrimaVie® Shilajit specifically, confirming its ability to increase testosterone levels in men. The study found that PrimaVie® Shilajit not only boosted total testosterone but also improved the levels of dehydroepiandrosterone (DHEAS), a hormone that serves as a precursor to testosterone. By enhancing both testosterone and its precursors, PrimaVie® Shilajit supports a more comprehensive approach to maintaining hormonal balance and promoting male vitality.

PrimaVie® Shilajit has also been shown to support mitochondrial function, which is crucial for energy production and overall cellular health. Healthy mitochondria are essential for testosterone synthesis, as they provide the energy required for hormone production. A study published in Phytotherapy Research demonstrated that shilajit improves mitochondrial function and increases ATP production, the energy currency of the cell. By enhancing mitochondrial efficiency, PrimaVie® Shilajit not only can support testosterone production but can also help to improve physical performance, stamina, and recovery, all of which are key variables in body transformation.

Additionally, PrimaVie® Shilajit is known for its ability to reduce oxidative stress and inflammation, both of which can negatively impact testosterone levels. Chronic oxidative stress can damage Leydig cells in the testes, which are responsible for testosterone production. By providing powerful antioxidant support, PrimaVie® Shilajit can help protect these cells from damage, ensuring sustained testosterone levels and overall hormonal health.

The inclusion of PrimaVie® Shilajit in this premium test booster offers a scientifically supported, natural approach to boosting testosterone levels and enhancing male vitality. Whether you're looking to improve your physical performance, support sexual health, or maintain energy levels, PrimaVie® Shilajit can provide a comprehensive solution backed by clinical studies and centuries of traditional use.


Tongkat Ali Extract (Eurycoma longifolia) (Root) (200:1)

The name Eurycoma longifolia is probably familiar to most within the bodybuilding and fitness community, as it has a long history of use as an aphrodisiac supplement. Also known as Tongkat Ali, Malaysian Ginseng, and long jack, the herb is found in temperate regions of Southeast Asia and has been used for centuries as an aphrodisiac in medicinal systems local to those regions. Tongkat Ali has gained popularity in modern times for its scientifically backed ability to boost testosterone, enhance physical performance, and improve overall male vitality.

One of the primary benefits of Tongkat Ali is its ability to naturally increase testosterone levels. A study published in the Journal of the International Society of Sports Nutrition looked at the effects of Tongkat Ali supplementation on testosterone levels in men who are experiencing stress-related low testosterone. The study concluded that daily supplementation with Tongkat Ali significantly increased free and total testosterone levels in the participants. This hormonal boost was accompanied by improvements in mood, libido, and overall well-being, underscoring Tongkat Ali’s role as a natural testosterone enhancer.

Tongkat Ali’s mechanisms of action involve several key factors involved in testosterone production and regulation. One of its most notable effects is the reduction of sex hormone-binding globulin (SHBG), a protein that binds to testosterone and makes it unavailable for the body’s use. By decreasing SHBG levels, Tongkat Ali can increase the amount of free, bioavailable testosterone in the body, which is the form of testosterone that is active and able to exert its beneficial effects.

Another key way that Tongkat Ali can support testosterone is by reducing overall cortisol levels. Cortisol, known commonly as the "stress hormone," can negatively impact testosterone production when present in high amounts. A study published in Phytotherapy Research found that Tongkat Ali supplementation led to a significant reduction in cortisol levels, which in turn contributed to higher testosterone levels and improved overall stress resilience. By balancing cortisol and testosterone, Tongkat Ali not only can support hormonal health but also enhance mental clarity and reduce the negative effects of chronic stress.

Additionally, Tongkat Ali has been shown to improve physical performance and muscle strength, both of which are closely linked to testosterone levels. A study examining the effects of Tongkat Ali on muscle strength and physical performance in athletes concluded that Tongkat Ali supplementation resulted in significant improvements in lean muscle mass, strength, and endurance, likely due to its testosterone-boosting properties. These findings suggest that Tongkat Ali can be particularly beneficial for men looking to enhance their athletic performance and physical resilience.

Tongkat Ali can offer a powerful, natural solution for those looking to boost their testosterone levels and improve overall vitality. Its clinically shown ability to increase free testosterone, reduce cortisol, and enhance physical performance makes it a versatile and effective supplement for supporting male health.


3,3’-Diindolylmethane (DIM)

What we typically refer to as “Estrogen,” is in fact a group of three biologically distinct hormones – estradiol (E2), estrone (E1), and estriol (E3), each possessing different activities in different cell, tissue, and receptor types. When experts refer to either the benefits or downfalls of “estrogen," they really mean to (but probably cannot) identify a specific estrogen.

These specific estrogens, in turn, metabolize into even more specific estrogen sub-compounds, such as the 2-hydroxyestrogens (2-OHE’s), 2-methoxyestrogens, 16a-hydroxyestrone (16-OHE1), and 4-hydroxyestrogens (4-OHE’s). As their parent estrogens, these estrogen metabolites exert different effects depending upon the tissue and cell one is examining. In fact, two estrogen metabolites in particular, 16-OHE1 and 2-OHE, have such contrasting cellular activities that 2-OHE is an estrogen antagonist. Yes, that is correct: there is an anti-estrogen, estrogen.

In recent years, so-called “phytonutrients” have become the focus of clinical research, as these natural compounds have shown the ability to increase the ratio of good, estrogen decreasing estrogens (such as 2-OHE), to bad, estrogen increasing estrogens (such as 16-OHE1). One of these phytonutrients, a dietary indole known as indole-3-carbinol (I3C), is the bioactive phytochemical and a presumed modulator of reduced cancer risk in areas with high cruciferous vegetable consumption. Unfortunately, despite its potent antiestrogenic activity, I3C is highly molecularly unstable, and therefore unsuitable for use as a therapeutic agent or dietary supplement.

Luckily, however, I3C readily metabolizes into the secondary indole 3,3’ diindolylmethane, or DIM for short. When used in a supplemental fashion in clinical trials, DIM appears to possess all the positive effects of its parent compound with respect to antiestrogenic action – promoting the metabolism of beneficial estrogens that themselves reduce estrogenic activity.

Aside from its healthy estrogen promoting abilities, DIM also exerts its own direct physiological effects, including:

  • Promoting pathways of internal estrogen metabolism that favors the production of anti-estrogen estrogens.
  • Adjusting the activity of certain cytochrome enzymes, reducing the activity at the estrogen receptor site.
  • Limit the cell division and growth of certain estrogens.

Despite the bodybuilding community’s single-minded crusade to eliminate estrogen wherever it lies in wait, compounds such as DIM show us that estrogen is a very diverse set of compounds – and that we should actively pursue increasing certain estrogens that have beneficial, and ironically, anti-estrogenic effects.


Apigenin (4’,5,7-Trihydroxyflavone) (Apium graveolens var. dulce)

Apigenin is a naturally occurring flavonoid found in a variety of plants, including parsley, chamomile, and celery. This potent compound has gained significant attention in recent years for its potential to support testosterone levels and boost overall male health. Emerging research highlights apigenin as a natural additive for those looking to optimize their hormonal balance, particularly through its effects on testosterone production and regulation.

One of the key benefits of apigenin for testosterone support lies in its ability to inhibit the enzyme aromatase. Aromatase is primarily responsible for influencing the conversion of testosterone into estrogen, a process that can lead to a decrease in testosterone levels. By inhibiting this enzyme, apigenin can help maintain higher levels of free testosterone in the body, promoting a more favorable balance between testosterone and estrogen. This effect is especially important for men as they age, when the natural conversion of testosterone to estrogen tends to increase.

Research has demonstrated that apigenin effectively inhibited aromatase activity in vitro, leading to higher testosterone levels in test subjects. This shows promise for apigenin’s potential as a natural aromatase inhibitor, making it a valuable tool for men looking to support their testosterone levels naturally.

In addition to its effects on aromatase, apigenin has been shown to influence the production of luteinizing hormone (LH), which plays a crucial role in regulating testosterone levels. One study found that apigenin increased LH levels in animal models, which in turn stimulated the testes to produce more testosterone. This dual action—reducing the conversion of testosterone to estrogen and boosting the signals that promote testosterone production can make apigenin a powerful tool for maintaining healthy testosterone levels.

Apigenin has further been shown to offer antioxidant properties that contribute to its testosterone-supporting effects. Oxidative stress can damage Leydig cells in the testes, which as we have found, are responsible for testosterone production. By neutralizing free radicals, apigenin can help protect these cells from critical damage, ensuring they can continue to produce testosterone efficiently and effectively. This protective effect is particularly valuable in aging men, where oxidative stress has been seen to greatly contribute to declining testosterone levels.

Overall, despite limited human studies, apigenin can represent a promising natural approach to supporting testosterone levels and male vitality through its in vitro studies as well as through other mechanisms that can further influence positive testosterone results.


Boron (as Boron Citrate)

Boron is a mineral present in multiple fruits, vegetables, tubers, and drinking water, though it is not widely accepted as either an essential mineral or essential vitamin. Boron affects a few physiological functions in the body, particularly modulating hormonal homeostasis.

While still emerging, recent data suggest that boron may play a role in potentiating free testosterone levels in healthy men. In one study, otherwise healthy men were provided an acute serving of boron and had their free and total levels of testosterone, alone with SHBG (sex hormone binding globulin) and DHT (dihydrotestosterone) levels measured. In that study, total testosterone was unaltered, but free testosterone was enhanced by 14%, while SHBG was significantly (9%) reduced. Boron has also shown substantial evidence in playing a role in supporting normal prostate function, specifically through lowering PSA (prostate specific antigen), which can be a marker for prostate abnormality advancement. Other studies have shown the effectiveness of adequate boron levels on optimizing prostate health. One human study concluded that men who ingested the greatest amount of boron in their diet were 54% less likely to be at risk of prostate related issues when compared to the lowest intake.


REFERENCES:

  • Bhattacharya SK, Muruganandam AV. Adaptogenic activity of Withania somnifera: An experimental study using a rat model of chronic stress. Pharmacol Biochem Behav 2003;75:547-55.
  • Singh G, Sharma PK, Dudhe R, Singh S. Biological activities of Withania somnifera. Ann Biol Res 2010;1:56-63.
  • Sharma V, Sharma S, Pracheta, Paliwal R. Withania somnifera: A rejuvenating ayurvedic medicinal herb for the treatment of various human ailments. Int J PharmTech Res 2011;3:187-92.
  • Kulkarni SK, Dhir A. Withania somnifera: An Indian ginseng. Prog Neuro-Psychopharmacol Biol Psychiatry 2008;32:1093-05.
  • Bhattacharya SK, Goel RK, Kaur R, Ghosal S. Antistress activity of sitoindosides VII and VIII, new acylsterylglucosides from Withania somnifera. Phytother Res 1987;1:32-7.
  • Ghosal S, Lal J, Srivastava R, Bhattacharya SK, Upadhyay SN, Jaiswal AK, et al. Immunomodulatory and CNS effects of sitoindosides IX and X, two new glycowithanolides from Withania somnifera. Phytother Res 1989;3:201 6.
  • Tiwari RK. Guo L. Bradlow HL. Telang NT. Osborne MP. Selective responsiveness of human breast cancer cells to indole-3-carbinol, a chemopreventive agent. J Natl Cancer Inst. 1994;86:126–131.
  • Sepkovic DW. Bradlow HL. Bell M. Quantitative determination of 3,3′-diindolylmethane in the urine of individuals receiving indole-3-carbinol. Nutr Cancer. 2002;41:57–63.
  • Li Y. Wang Z. Kong D. Murthy S. Dou QP. Sheng S. Reddy GP. Sarkar FH. Regulation of FOXO3a/β catenin/GSK-3β signaling by 3,3′-diindolylmethane contributes to inhibition of cell proliferation and induction of apoptosis in prostate cancer cells. J Biol Chem. 2007;282:21542–21550.
  • Rahman KM. Ali S. Aboukameel A. Sarkar SH. Wang Z. Philip PA. Sakr WA. Raz A. Inactivation of NF-κB by 3,3′-diindolylmethane contributes to increased apoptosis induced by chemotherapeutic agent in breast cancer cells. Mol Cancer Ther. 2007;6:2757–2765.
  • Paulraj, J., Govindarajan, R., & Palpu, P. (2013). The genus spilanthes ethnopharmacology, phytochemistry, and pharmacological properties: a review. Advances in pharmacological sciences, 2013, 510298. https://doi.org/10.1155/2013/510298
  • Prachayasittikul, V., Prachayasittikul, S., Ruchirawat, S., & Prachayasittikul, V. (2013). High therapeutic potential of Spilanthes acmella: A review. EXCLI journal, 12, 291–312.
  • Abdul Rahim, R., et al. (2021). Potential Antioxidant and Anti-Inflammatory Effects of Spilanthes acmella and Its Health Beneficial Effects: A Review. Int J Environ Res Public Health, 18(7), 3532. https://doi.org/10.3390/ijerph18073532
  • Cho, Y. C., et al. (2017). Spilanthes acmella inhibits inflammatory responses via inhibition of NF-κB and MAPK signaling pathways in RAW 264.7 macrophages. Mol Med Rep, 16(1), 339–346. https://doi.org/10.3892/mmr.2017.6555
  • Martin, L. J., & Touaibia, M. (2020). Improvement of Testicular Steroidogenesis Using Flavonoids and Isoflavonoids for Prevention of Late-Onset Male Hypogonadism. Antioxidants (Basel), 9(3), 237. https://doi.org/10.3390/antiox9030237
  • Salehi, B., et al. (2019). The Therapeutic Potential of Apigenin. Int J Mol Sci, 20(6), 1305. https://doi.org/10.3390/ijms20061305
  • Fangfang Wang, et al. (2024). Systemic meta-analysis: apigenin’s effects on lung inflammation and oxidative stress. J Asthma 61:4, 271-281.
  • Li, W., et al. (2011). Effects of apigenin on steroidogenesis and steroidogenic acute regulatory gene expression in mouse Leydig cells. J Nutr Biochem, 22(3), 212–218. https://doi.org/10.1016/j.jnutbio.2010.01.004
  • Sanderson, J. T., et al. (2004). Induction and Inhibition of Aromatase (CYP19) Activity by Natural and Synthetic Flavonoid Compounds in H295R Human Adrenocortical Carcinoma Cells. Toxicol Sci, 82(1), 70–79. https://doi.org/10.1093/toxsci/kfh257
  • Liling Wu, et al. (2024). Apigenin improves testosterone synthesis by regulating endoplasmic reticulum stress. Biomed Pharmacother, 177, 117075. https://doi.org/10.1016/j.biopha.2024.117075
  • Maheshwari, A., et al. (2017). Efficacy of FurosapTM, a novel Trigonella foenum-graecum seed extract, in Enhancing Testosterone Level and Improving Sperm Profile in Male Volunteers. Int J Med Sci, 14(1), 58–66. https://doi.org/10.7150/ijms.17256
  • Sankhwar, S. N., et al. (2023). Safety and Efficacy of Furosap®, a Patented Trigonella foenum-graecum Seed Extract, in Boosting Testosterone Level, Reproductive Health and Mood Alleviation in Male Volunteers. J Am Nutr Assoc, 42(1), 27–35. https://doi.org/10.1080/07315724.2021.1978348
  • Aitken, R. John, Roman, Shaun D. Antioxidant Systems and Oxidative Stress in the Testes. Oxid Med Cell Longev, 1, 616821, 2008. https://doi.org/10.4161/oxim.1.1.6843
  • Pandit, S., et al. (2016). Clinical evaluation of purified Shilajit on testosterone levels in healthy volunteers. Andrologia, 48(5), 570–575. https://doi.org/10.1111/and.12482
  • Keller, J. L., et al. (2019). The effects of Shilajit supplementation on fatigue-induced decreases in muscular strength and serum hydroxyproline levels. J Int Soc Sports Nutr, 16(1), 3. https://doi.org/10.1186/s12970-019-0270-2
  • Talbott, S. M., et al. (2013). Effect of Tongkat Ali on stress hormones and psychological mood state in moderately stressed subjects. J Int Soc Sports Nutr, 10(1), 28. https://doi.org/10.1186/1550-2783-10-28
  • Tambi, M. I., et al. (2012). Eurycoma longifolia Jack in managing idiopathic male infertility. Asian J Androl, 14(1), 94-105.
  • Hamzah, S., & Yusof, A. (2003). The ergogenic effects of Eurycoma longifolia Jack: A pilot study. Br J Sports Med, 37(5), 464-470.
  • Ismail, S. B., et al. (2012). Randomized clinical trial on the use of Tongkat Ali (Eurycoma longifolia) for androgen deficiency aging male (ADAM). Aging Male, 15(2), 153-153.
  • Henkel, R. R., et al. (2014). Tongkat Ali as a potential herbal supplement for physically active male and female seniors--a pilot study. Phytother Res, 28(4), 544–550. https://doi.org/10.1002/ptr.5017
  • Rehman, S. U., et al. (2016). Review on a Traditional Herbal Medicine, Eurycoma longifolia Jack (Tongkat Ali): Its Traditional Uses, Chemistry, Evidence-Based Pharmacology and Toxicology. Molecules, 21(3), 331. https://doi.org/10.3390/molecules21030331
  • Leisegang, K., et al. (2022). Eurycoma longifolia (Jack) Improves Serum Total Testosterone in Men: A Systematic Review and Meta-Analysis of Clinical Trials. Medicina (Kaunas), 58(8), 1047. https://doi.org/10.3390/medicina58081047
  • Pizzorno L. (2015). Nothing Boring About Boron. Integr Med (Encinitas), 14(4), 35–48.
  • Naghii, M. R., et al. (2011). Comparative effects of daily and weekly boron supplementation on plasma steroid hormones and proinflammatory cytokines. J Trace Elem Med Biol, 25(1), 54–58. https://doi.org/10.1016/j.jtemb.2010.10.001
  • Ambiye VR, et al. Clinical Evaluation of the Spermatogenic Activity of the Root Extract of Ashwagandha (Withania somnifera) in Oligospermic Males: A Pilot Study. Evid Based Complement Alternat Med. 2013;2013:571420. doi: 10.1155/2013/571420. Epub 2013 Nov 28. PMID: 24371462; PMCID: PMC3863556.