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  • Same Great Formula With 15% More – Now a 30-Day Supply
  • With Somatrin™ Growth Factors
  • Clinical Studies Showing Increased Free Testosterone
  • Contains an Exclusive Anti-Estrogen Complex



iSatori ISA-Test GF: High Performance Testosterone Booster with Gluten-Free Anti-Estrogen Complex

HIGH PERFORMANCE TESTOSTERONE BOOSTER FOR MUSCLE AND STRENGTH: When you want results in and out of the gym, look no further that iSatori’s premium Test Booster ISA-TEST GF. ISA-TEST GF is a precise combination of ingredients clinically shown to support increases in testosterone and a reduction in the “female-hormone” estrogen. It’s designed to promote gains in strength, increased muscle mass, and improved sexual drive and performance.

TESTOSTERONE AND GROWTH FACTORS: Unlike other “Test Boosters”, the ingredients in ISA-TEST have been shown to raise testosterone, but they also focus on elevating critical growth factors. This is a one-two punch when it comes to accelerated recovery from workouts as well as improved lean muscle mass.

FIND A NEW LEVEL OF LIBIDO AND DRIVE: The advanced formula also includes key ingredients to support a strong sex drive and libido, and decrease the occasional feeling of fatigue. This is one of the desired effects that people look for in a leading testosterone/performance booster.

SCIENCE + WORK = RESULTS: iSatori sports nutrition supplements can help support you in reaching your fitness goals. When you work hard at achieving your optimal body, you need to protect your investment. By combining our nutritional supplements with your workouts, you leverage our science to maximize higher energy levels and reduce your recovery time.

ISA-TEST Callouts

Benefits of iSatori ISA TEST GF Testosterone Boost Supplement

Increase Strength

High Performance

Confirmed in research studies, the ingredients in Isa-Test GF demonstrate strong properties to boost libido and increase muscle mass. Epimedium, also known as ‘horny goat weed’ may help decrease fatigue and improve sex drive.

Muscle Building

Muscle Toning

Promotes healthy body composition while supporting healthy testosterone levels without banned substances such as growth hormone or anabolic steroids.

Speed Up Workout Recovery

Increase Strength

Increases work efficiency under stressful conditions, improving athletic performance, strength, and promoting recovery after intense muscular workloads.

Benefits Both Men and Women

Healthy Body

iSatori’s mission is to create the most talked about, well respected and sought after nutritional products and solutions for building a better body and stronger, healthier life.

Why is ISA-TEST GF Unique

Why is ISA-TEST GF Unique?

ISA-TEST GF is a precise combination of ingredients clinically shown to support increases in testosterone and a reduction in the “female-hormone” estrogen. It’s designed to promote noticeable gains in strength, increased muscle mass, and improved sexual drive and performance.

Loading or cycling is not necessary. And because it is an herbal based supplement, it won’t shut down your body’s own production of testosterone; so you won’t need to cycle on and off the product.

Frequently Asked Questions

With the guidance of a leading pharmaceutical specialist and medical doctor, iSatori developed an exclusive Rapid Bio-Diffusion Delivery™ technology, which uses a sophisticated “micro-particlization” process, so it starts working from the very first dose to help the body’s natural testosterone production.∆ⱡ Within 30 minutes of taking this supplement, you’ll begin to “feel” it going to work… an instant rush of testosterone… because of its fast absorption and increased potency.∆ⱡ No other testosterone formula contains this state-of-the-art delivery technology. You can find it only in ISA-TEST products.
The efficacy of its incredible testosterone-enhancing and estrogen-reducing effects were scientifically documented by researchers Rob Mendel, PhD, and Dr. Tim Ziegenfuss of the Ohio Research Group of Exercise Science and Sports Nutrition! The conclusion of the study, after just three weeks (and it works on a progressive basis), Free or usable testosterone levels increased by up to 154%, and estrogen levels decreased by up to 43%. Equally important, all of the subjects’ health markers (e.g., liver, kidney, cholesterol, blood pressure, etc.) were normal and healthy. So, we know, without a reason of a doubt, it works fast and is safe.∆
Take a full dose (four capsules) 60 minutes before weight training. On non-training days, take one full dose before bedtime to optimize the restorative effects of testosterone while sleeping.
“Loading” or “cycling” is not necessary. And because it is an herbal-based supplement and it won’t shut down your body’s own production of testosterone, you don’t need to cycle it and can use it for extended periods of time.∆ It is, however, always a good idea to take a break for one to two weeks, after using any kind of supplement after 12 weeks.
While estrogen does have important functional roles in men (such as maintaining bone and cardiovascular health), in excess, estrogen can promote water retention, increase bodyfat, and cause gynecomastia; that is, the female-like increase in breast tissue. This is particularly true in men who are already overweight and/or have elevated blood sugar levels. Some research even indicates increasing levels of environmentally produced, synthetic estrogens (called xenoestrogens) have the potential to disrupt the delicate endocrine system in men, potentially reducing sperm counts and increasing the risk of testicular cancer. The goal with this product is to keep estrogen at levels that optimize health and body composition.∆ⱡ
Although ISA-TEST GF has been designed as a standalone supplement, there are three other supplements you can take to magnify its health benefits. First and foremost is BIO-GRO™, which compliments elevated te4stosterone with key bio-active peptides including growth factors. Second is protein such as 100% BIO-ACTIVE WHEY before and after training. And third is a high-quality creatine like CREATINE A5X™ ideally taken within minutes after each training session.
  • Ang, H.H., and Lee, K.L., “Effect of Eurycoma longifolia Jack on Orientation Activities in Middle-Aged Male Rats,” Fundam Clin Pharmacol 16.6 (2002) : 479-83.
  • Ang, H.H., Sim M.K., “Eurycoma longifolia Jack Enhances Libido in Sexually Experienced Male Rats,” Exp Anim 46.4 (1997): 287-90.
  • Annewieke, W., “Measures of Bioavailable Serum Testosterone and Estradiol and Their Relationships with Muscle Strength, Bone Density, and Body Composition in Elderly Men,” J Clin Endocrinol Metab 85 (2000): 3276-82.
  • Gauthaman, K., et al., “Aphrodisiac Properties of Tribulus Terrestris Extract (Protodioscin) in Normal and Castrated Rats,” Life Sci 71.12 (2002): 1385-96.

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