★★★★★ 4.9 (57 Reviews)

The Research Behind APEX

A 10-ingredient testosterone support formula built on human clinical trials — no proprietary blends, nothing hidden.
$49.99
Buy APEX — Male Vitality · $49.99
Clinically studied ingredients
Pause or cancel anytime

One Formula. Ten Botanicals. Four Pathways.

Most "testosterone boosters" pull one lever — stimulation, or a single underdosed herb. APEX is built around four distinct biological pathways — free testosterone, natural production, cortisol control, and fertility — each with at least one ingredient carrying human-trial evidence. Here's the map:

SHBG Unlock

SHBG Unlock

12-week human trial (Furosap®)
Lignans in nettle root bind to SHBG — the protein that locks up testosterone — supporting greater free testosterone availability.
Nettle RootFenugreek
Natural Production Support

Natural Production Support

human trial, 200mg/day (Tongkat Ali)
Botanicals that support the body's own testosterone production rather than replacing it — no synthetics, no shutdown.
Tongkat AliPine PollenBulbine Natalensis
Cortisol Control

Cortisol Control

NIH-indexed study (Tongkat Ali)
Chronic stress raises cortisol, which suppresses testosterone. Adaptogens in the formula support a healthier testosterone-to-cortisol ratio.
Tongkat AliEleutheroMilky Oats
Enzyme Preservation

Enzyme Preservation

double-blind RCT (Eleuthero)
Compounds that may inhibit aromatase and 5α-reductase — the enzymes that convert testosterone into estrogen and DHT — helping preserve what your body makes.
Nettle RootFenugreek
Adaptogenic Endurance

Adaptogenic Endurance

620-patient randomized trial (Nettle Root)
Classic adaptogens that support stamina, VO₂ peak, and resilience under physical stress.
EleutheroBlack Maca
Nutrient & Absorption Foundation

Nutrient & Absorption Foundation

Phyto-androgen-containing pollen, nervine tonics, and absorption-supporting roots that round out the formula's foundation.
Pine PollenMilky OatsSarsaparilla

The 11 Ingredients Behind FLOW

Every claim on this page is linked to standard PubMed databases. Stat callouts reference studies of single ingredients, not the finished FLOW formula. We label them so you can judge for yourself.

Tongkat Ali

HUMAN TRIAL
The formula's anchor. In a human trial, 200mg/day took the share of men with normal testosterone from 35% to over 90% in one month. A separate NIH-indexed study recorded sperm count increases up to 256% over 9 months in men with idiopathic infertility. It also reduced salivary cortisol 16% in stressed adults.
35% → 90%+normal testosterone (human trial, 200mg/day)
Honesty note: Works best in men with low or declining baseline testosterone — if your levels are already optimal, expect subtler results.
Well tolerated in trials up to 12 weeks. Possible insomnia, irritability, or restlessness at high doses — take it earlier in the day if you're sensitive. May affect blood sugar
Tambi et al., Andrologia (2012) — 76 men, 200mg/day, 1 month (35%→90%+ normal T); fertility: Ismail et al., Asian Journal of Andrology (2012) — NIH-indexed, 9 months

Fenugreek

HUMAN RCT
Two standardized extracts carry human data: Furosap® (500mg/day, 12 weeks, 50 men, open-label) showed up to 46% higher free testosterone in 90% of participants; Testofen® (600mg/day, 8-week RCT, 138 men) showed +1.8% lean mass and −1.4% body fat with resistance training.
↑ 46%free testosterone (Furosap®, 12-week trial)
Honesty note: The 46% figure comes from an open-label study — real, but not placebo-controlled. The RCT data (lean mass, body fat) only appears alongside resistance training.
May cause mild digestive upset in the first days and a harmless maple-syrup-like body odor in some users. Can lower blood sugar — check with your doctor if you're on diabetes medication. Legume family: caution with peanut/legume allergy.
Testofen®: Wankhede et al., J. Int. Soc. Sports Nutrition (2016) — 138 men, 600mg/day, 8 weeks + resistance training; Furosap®: Maheshwari et al. / NCT02702882 (2017) — open-label (Pilot)

Nettle Root

HUMAN RCT
The SHBG specialist. Its lignans bind sex hormone-binding globulin, supporting free testosterone availability, and it may inhibit the enzymes that convert testosterone to estrogen and DHT. It is also the most-studied botanical in the formula for prostate health (620-patient RCT).
Supports Free TBinds SHBG
Honesty note: It doesn't raise total testosterone — it frees what you already have. Subtle mechanism, strong prostate data.
Excellent safety record across large trials, including the 620-patient RCT. Rare mild stomach upset. May have mild blood-pressure and blood-sugar effects — worth mentioning to your doctor if you medicate either.
Safarinejad, J. Herbal Pharmacotherapy (2005) — 620 patients, randomized, double-blind, 6 months

Black Maca

HUMAN RCT
The fertility powerhouse that works without touching testosterone — human trials consistently show no T change, and consistent libido and sperm-parameter benefits anyway. Black maca specifically outperforms yellow and red varieties for semen volume, count, and motility.
↑ Sperm count & Motility(Independent of testosterone)
Honesty note: It won't move your testosterone numbers — the libido and fertility benefits work through other pathways. That's established science, not a weakness.
Consumed as a food staple in Peru for centuries with an outstanding safety profile. Gelatinized forms are easiest on digestion. No known hormonal interactions.
Gonzales et al., Andrologia (2009)/libido RCTs — 1.5–3g/day, 6–12 weeks; fertility: Gonzales et al., Asian Journal of Andrology (2001–2003 series)

Pine Pollen

HUMAN PILOT
One of the only plants containing actual phyto-androgens — plant analogs of testosterone, DHEA, and androstenedione — plus 200+ bioactive compounds. A 2024 pilot study showed a positive trend in testosterone in older men with low-T symptoms; human research is still early.
200+Bioactive compounds incl. phyto-androgens
Honesty note: The phyto-androgens are real; the human absorption research is early. One small 2024 pilot study — promising, not proven.
Avoid if you have a pollen allergy — this one is literal. Otherwise well tolerated at typical doses.
2024 pilot study — older men with low-T symptoms, positive trend (small n, preliminary)

Bulbine Natalensis

LAB RESEARCH
The emerging one — and we'll be straight with you. In preclinical (animal) research at 25–50mg/kg, it raised serum testosterone 347% by elevating the body's own production enzymes. Human trials haven't caught up yet. We include it at conservative doses as a supporting player, not the star.
↑ 347%Testosterone — preclinical, animal study
Honesty note: A 28-day human safety study showed no adverse biomarker changes at conservative doses; high-dose animal studies raised liver and kidney concerns. We stay well below those doses — and this is an ingredient to cycle, not megadose.
Yakubu & Afolayan, Pharmaceutical Biology (2010) — Wistar rats, 25–50mg/kg, +347% serum T 🅿

Tribulus Terrestris

HUMAN TRIAL
Here's what most brands won't tell you: tribulus has repeatedly failed to raise testosterone in human trials. We include it for what the evidence does support — libido and sexual function — not for the marketing myth.
Libido support(Human evidence); not a testosterone driver
Honesty note: Failed to raise testosterone in multiple human trials. Included for libido evidence only — and there are documented liver/kidney case reports at high doses.
Generally well tolerated short-term. Doses above 1,000mg/day have been linked to sleep disturbance and elevated heart rate, and rare case reports of liver and kidney harm exist. More reason we keep it in a supporting dose.
Kamenov et al. (2017) — libido/sexual function; counterpoint: multiple RCTs show no testosterone effect

Milky Oats

LAB RESEARCH
A classic nervine tonic — traditional support for the nervous system, stress, and performance anxiety. No hormonal claims; it's here for the stress side of the equation.
Nervine tonicStress & performance support
Honesty note: Zero hormonal evidence. A nervine tonic with centuries of traditional use — here for stress and performance anxiety, nothing more.
One of the gentlest herbs in the formula. Caution only if you have celiac disease — oat products can carry gluten cross-contact.
No human clinical trials for hormonal claims — traditional/nervine use; label as "traditional use"

Eleuthero

HUMAN RCT
The adaptogen with the endurance data: 800mg/day for 8 weeks produced +23% endurance time and +12% VO₂ peak vs placebo in a randomized double-blind trial. Stress resilience that shows up in the gym.
↑ 23% endurance, ↑ 12% VO₂ peak(8-week RCT)
Honesty note: The endurance RCT is solid (2010, double-blind); older Soviet-era ergogenic claims didn't survive modern scrutiny. We cite the one that did.
Well tolerated in trials up to 1,200mg/day. Mild insomnia possible if taken late in the day. If you're on digoxin or blood-pressure medication, clear it with your doctor first.
Kuo et al., Chinese Journal of Physiology (2010) — 800mg/day, 8 weeks, +23% endurance, +12% VO₂ peak

Sarsaparilla

LAB RESEARCH
A traditional root with anti-inflammatory properties and a practical job in this formula: saponins that may support absorption of the other ingredients. Its sterols don't convert to testosterone in the body — anyone who tells you otherwise is guessing.
Absorption & anti-inflammatory supportonset and longer duration vs synthetic
Honesty note: No human trials for any male-health claim. It's in the formula for saponin-driven absorption support — pharmacology, not marketing.
High doses can irritate the stomach lining, and saponins may change how medications are absorbed — take APEX a couple of hours apart from prescriptions, or ask your pharmacist.
In vitro/traditional only — sterols do not convert to testosterone in vivo
*Based on published studies of individual ingredients, including preclinical research. Individual results may vary.

Frequently Asked Questions

Everything you need to know about our formula, ingredients, and how it works.

General

Most "boosters" are underdosed or stimulant-based; APEX supports the body's own production and free-T availability with full, printed doses; nothing synthetic.

Yes, designed as a synergistic stack (FLOW neurological, APEX hormonal, CHRG cellular energy).

No. Dietary supplement, not a hormone therapy; consult physician for clinically low T; men on TRT should talk to their doctor before combining.

Safety

Generally well tolerated; possible mild digestive adjustment; fenugreek maple-syrup body odor.

Fenugreek (legume family), milky oats (possible gluten cross-contact), pine pollen (pollen allergy).

Shipping & Guarantee

  • 100% risk-free 30-day money-back guarantee — full refund, no return shipping, no exit survey.

Who APEX Is For?

Whether you're protecting what you've built, rebuilding what you lost, or starting a family — APEX meets you where your testosterone actually is.

Men Over 40

Support the testosterone your body still knows how to make

Athletes & Lifters

Recovery and endurance that match the work you put in

Men Coming Off TRT

Support your own production — talk to your doctor first

Fertility-Focused

Sperm health support without shutdown risk

High Performers

Drive in the gym, the boardroom, and the bedroom

Skeptics

You were right about the others. Read our label.

Sources — every study cited on this page
Page Claim Evidence Tier Study Citation PubMed Link
Tongkat Ali 200mg/day: men with normal testosterone rose from 35% to over 90% (1 month) Human Trial Tambi et al., "Standardised water-soluble extract of Eurycoma longifolia, Tongkat ali, as testosterone booster for managing late-onset hypogonadism?" Andrologia (2012) PubMed
Tongkat Ali: sperm count increases up to 256% and improved concentration in idiopathic male infertility (9 months) Human Trial Ismail et al., "Eurycoma longifolia Jack in managing idiopathic male infertility," Asian Journal of Andrology (2010) PubMed
Tongkat Ali 200mg/day: salivary cortisol reduced 16% in moderately stressed adults Human Trial Talbott et al., "Effect of Tongkat Ali on stress hormones and psychological mood state in moderately stressed subjects," J. Int. Soc. Sports Nutrition (2013) PubMed
Fenugreek Furosap® 500mg/day: up to +46% free testosterone in 90% of participants (12 weeks) Human Pilot Maheshwari et al., "Efficacy of Furosap™, a novel Trigonella foenum-graecum seed extract, in Enhancing Testosterone Level and Improving Sperm Profile in Male Volunteers," Int. J. Medical Sciences (2017) PubMed
Furosap® safety/efficacy replication Human Pilot "Safety and Efficacy of Furosap®, a Patented Trigonella foenum-graecum Seed Extract, in Boosting Testosterone Level…" (2023) PubMed
Fenugreek 600mg/day + resistance training: +1.8% lean mass, −1.4% body fat (8 weeks, 138 men) Human RCT Wankhede et al., "Beneficial effects of fenugreek glycoside supplementation in male subjects during resistance training: A randomized controlled pilot study," J. Int. Soc. Sports Nutrition (2016) PubMed
Fenugreek standardized extract: improved physiological aspects of male libido Human RCT Steels et al., "Physiological aspects of male libido enhanced by standardized Trigonella foenum-graecum extract and mineral formulation," Phytotherapy Research (2011) PubMed
Nettle Root: 81% vs 16% placebo response; urinary flow +8.2 mL/s (620 patients, 6 months) Human RCT Safarinejad, "Urtica dioica for treatment of benign prostatic hyperplasia: a prospective, randomized, double-blind, placebo-controlled, crossover study," J. Herbal Pharmacotherapy (2005) PubMed
Maca 1.5–3g/day: improved sexual desire with no change in serum testosterone Human RCT Gonzales et al., "Effect of Lepidium meyenii (MACA) on sexual desire and its absent relationship with serum testosterone levels in adult healthy men," Andrologia (2002) PubMed
Maca: improved semen parameters (volume, count, motility) in adult men Human Trial Gonzales et al., "Lepidium meyenii (Maca) improved semen parameters in adult men," Asian Journal of Andrology (2001) PubMed
Eleuthero 800mg/day: +23% endurance time, +12% VO₂ peak (8 weeks) Human RCT Kuo et al., "The effect of eight weeks of supplementation with Eleutherococcus senticosus on endurance capacity and metabolism in human," Chinese Journal of Physiology (2010) PubMed
Bulbine natalensis: +347% serum testosterone at 25–50mg/kg — ANIMAL DATA Lab Research Yakubu & Afolayan, "Anabolic and androgenic activities of Bulbine natalensis stem in male Wistar rats," Pharmaceutical Biology (2010) PubMed
Bulbine natalensis: reproductive toxicology evaluation (safety context) Lab Research Yakubu & Afolayan, "Reproductive toxicologic evaluations of Bulbine natalensis Baker stem extract in albino rats," (2009) PubMed
Tribulus terrestris: improved sexual function in male sexual dysfunction trial Human RCT Kamenov et al., "Evaluation of the efficacy and safety of Tribulus terrestris in male sexual dysfunction — prospective, randomized, double-blind, placebo-controlled clinical trial," Maturitas (2017) PubMed
Tribulus & other phytotherapics: evidence review on testosterone, sperm, prostate (counterpoint citation) Lab Research "Beyond tribulus (Tribulus terrestris L.): The effects of phytotherapics on testosterone, sperm and prostate parameters" (2019) PubMed
Pine Pollen 2024 pilot in older men with low-T symptoms Human Pilot Citation pending — small preliminary study; verify before publishing —
Milky Oats / Sarsaparilla Lab Research No human clinical trials — traditional use only —
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.