Rated 4.08 out of 5 based on 12 customer ratings
12 Reviews
(14 customer reviews)


Get the muscle-building results you want by manipulating three key hormones: testosterone, growth hormone factors, and estrogen. If you can increase test and GF while blocking estrogen, you’re looking at potent increases in size and strength! ISA-TEST will manipulate all three, with no adverse effects!

Only 1 left in stock

Brand: iSatori
SKU: 883488005077

Brand: iSatori
SKU: 883488005077

Get the muscle-building results you want by manipulating three key hormones: testosterone, growth hormone factors, and estrogen. If you can increase test and GF while blocking estrogen, you're looking at potent increases in size and strength! ISA-TEST will manipulate all three, with no adverse effects!

Key Features:

  • Increases Testosterone Production, clinical trials show an increase in Free Testosterone
  • Includes Somatrin: raises anabolic growth factor levels
  • P-450, unique to ISA-TEST, reduces Estrogen levels
  • Increased muscle size, more strength, and supports sexual health

Take a look at the Ingredients:


Somatrin is an exclusive ingredient in ISA-TEST GF, that studies show can increase growth hormone factors when taken prior to training (see below).

Meeking, DR, et al., Exercise-induced GFsecretion is enhanced by the oral ingestion of melatonin in healthy adult male subjects, Eur J Endocrinol. 1999 Jul;141(1):22-6.

Testofen (Trigonella Foenum Greacum)

Testofen, known mostly in Europe, contains several potent anabolic compounds, including Protodioscin and Steroidal Saponins, each one has been shown to increase testosterone levels, which in turn will increase muscle size and libido.
Research has shown that most of these steroidal saponins are saponin glycosides. Fenuside, a group of saponin glycosides exclusive to Testofen and produced naturally only by Testofen, have been standardized for maximum strength.

Testofen has been shown to have actions similar to Testosterone because it binds to Testosterone receptor sites.
The critical thing is that Testofen will do this without turning your own natural production of Testosterone off.
Testofen – one of bodybuilding's best-kept secrets!

Tribulus Terrestris

This herb has origins in Bulgaria. Tribulus helps your body naturally increase testosterone levels and maintain levels that are within the normal range.

Eurycoma longifolia (or, Longjax).

Animal research has shown that Longjax can increase test levels with no side effects.

Zinc/Magnesium (Zinc Aspartate, Magnesium Aspartate)

This mineral combination has two studies behind it.

Consistent training can cause a depletion of vital minerals in the muscle cells, such as zinc. Zinc also plays a role in your ability to get a good night's sleep. This is important as your body releases many more hormones when you sleep well, namely testosterone and growth hormone, two of your body's most important natural anabolic hormones. In fact, testosterone secretion in men happens while we sleep, and peaks in the early morning hours. Supplementing with zinc helps replace levels depleted due to training and also supplies enough for a good night's sleep.

As well, zinc and magnesium combined have been shown to reduce levels of the hormone cortisol, a catabolic hormone released in response to stress, which includes the stress of intense training sessions.

Zinc and magnesium deficiencies are common in the general public including bodybuilders, weight trainers, and athletes, for this reason, zinc/magnesium supplementation has become popular.


Ajuga, a herbal remedy used in Central Asia for several thousand years, supports strength and stamina under exhausting conditions, such as intense weight training.


A plant that grows throughout eastern Siberia. Currently, Rhaponticum, a plant from Siberia, is found in the Russian Pharmacopoeia as improving training performance, as well as supporting increased work efficiency while under stressful conditions and promoting post-workout recovery.

P-450 Hesperetin

[(S)-2,3-dihydro-5,7-dihydroxy-2-(3-hydroxy-4- methoxyphenyl)-4-H-1-benzopy-ran-4-one]) Hesperetin is a citrus bioflavonoid found in oranges and lemons that has potent antioxidant properties


Or horny goat weed, as it's more commonly known, epimedium grows in both Asia and the Mediterranean region. It's commonly used to help treat fatigue.

Grape Seed Extract

Containing the active compounds oligomeric proanthocyanidins (or, OPC). OPC has demonstrated potent antioxidant and cardio-supporting properties.

Rapid Bio-Diffusion Delivery Technology

Exclusive to iSatori Technologies, Rapid Bio-Diffusion Delivery uses a 'micro-particlization' process. This means Isa-Test begins to increase your testosterone levels right from the first dose!


Supplement Facts

26 servings per container
Serving size
4 Tablets
Amount Per Serving
% Daily Value
Vitamin B6 (Pyridoxine HCl)
7 mg
Vitamin C (As Ascorbic Acid)
25 mg
Zinc (As Zinc Aspartate)
20 mg
Magnesium (As Oxide & Aspartate)
300 mg
Isa-Test, A Proprietary Blend Containing
1,814 mg
TESTOFEN (Trigonella Foenum Graecum Extract Standardized For 50% Fenuside Saponins), Tribulus Terrestris Extract (60% Total Saponins / 20% Protodioscin), Eurycoma Longifolia 20:1 Extract, Epimedium Sagittatum & Brevicornum Extract (Standardized For 10% Icariin), P-450 Anti-Aromatase [(S)-2,3- Dihydro-5,7-Dihydroxy-2-(3-Hydroxy-4- Methoxyphenyl)-4-H-1benzopy-Ran-4-One], Ajuga Turkestanica & Rhaponticum Carthamoides Root Extract (Standardized For 11,20 Dihydroxyecdysone, 20-Beta-Hydroxyecdysone And 25-Deoxy-20- Hydroxyecdysone), Grapeseed Extract (95% Oligomeric Proanthocyanidins) Isaflow Microcirculation/nutrient Delivery System [Specially Prepared Hesperidin Methyl Chalcone, Ruscus (20% Sterolic Heterosides) & Vitamin C Complex]
325 mg
Nettle Extract (95% Divanillyltetrahydrofuran), Mucuna Pruriens (Standardized For 15% L-Dopa), N-Acetyl-5-Methoxytryptamine (Melatonin)

Daily Value not established.

Other Ingredients:

Gelatin Capsule, Microcrystalline Cellulose, Magnesium Stearate, Silicon Dioxide, Titanium Dioxide, FD&C Yellow #6, FD&C Blue #1, FD&C Red #40.
P-450 Estrogen Inhibitor Is A Registered Trademark Of ISatori Technologies, LLC.
P-450 Estrogen Inhibitor is a registered trademark of iSatori Technologies, LLC. Testofen is a trademark of Gencor Pacific, Inc. Somatrin is a registered trademark of iSatori Technologies, LLC.

Global Disclaimer

Manufacturers continually change product specifications, descriptions and ingredients. While we try our best to keep all product information up to date, it may not reflect the latest information available from the manufacturer. Product packaging may contain different or additional information, including the product description, nutritional facts, ingredients, allergens and other information. Always read labels, warnings, and directions and other information provided with the product before using or consuming a product. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. For additional information about a product, please contact the manufacturer.

As a dietary supplement, take 4 capsules with a full glass of water one hour prior to exercise. On non-training days, take 4 capsules one hour prior to bedtime. Take with or without food. FOR BEST RESULTS, use continuously for a minimum of 8 weeks.



Use only as directed. Do not exceed the suggested daily dose. Not intended for individuals under the age of 18, unless instructed by a doctor. Women should not use this supplement; so obviously, do not use this product if you are pregnant, nursing, or are contemplating pregnancy. If you have a medical condition or are taking any prescription medications, please consult your physician first. WARNING: For adult use only at bedtime. This product is not to be taken by pregnant or lactating women. If you are taking medication or have a medical condition, consult a physician before using this product. Do not use in conjunction with alcoholic beverages, when driving a vehicle, or while operating machinery.

Additional information

Weight 5.1 oz
Dimensions 5.5 × 2.5 × 2.5 in

14 reviews for iSatori ISA-TEST GF

  1. Rated 5 out of 5
    12 Reviews


    I’ve been on this now for a few weeks, I’ve been taking it on training days with my pre workout drink. On off days I take it mid morning. I’ve noticed my strength has gone up quite a bit and I have a lot more energy. I have also noticed I get angry a little faster than usual but nothing that has caused any problems or anything. My sex drive has not been affected as much as with other test boosters but I like the strength increases I’ve been getting from this. Great stuff!

  2. Rated 5 out of 5
    12 Reviews

    No Nrg

    Took for one bottle and could feel the difference. Gave me that little extra push in the gym. Also helped me cut a bit of fat while maintaining weight. Very solid product.

  3. Rated 5 out of 5
    12 Reviews


    Just started my 2nd bottle. Very pleased with everything. Not sure it affected the libido as much as everyone has said. But I didn’t think it could have gone much higher to begin with.
    Definately get a better nights rest. Which is important with my job may only get 3-4 hours but its a solid 3-4 hours.
    I used to get mad when I would see someone texting and driving, now it downright pisses me off, which could be from the increase in test.
    I would give it a shot if you are looking to get a bit more out of yourself in everything you do.

  4. Rated 4 out of 5
    12 Reviews


    I’m happy with it. I felt like I got more out of it the first month than the second, but there was a noticeable increase in muscle overall.

  5. mikadena

    i took a whole bottle just as instructed and saw no results difference in body weight appearance strenght .im at the gym religiously every 2 days did the same training program same diet to see if there would be an effect and there wasnt won’t buy again.

  6. Rated 4 out of 5
    12 Reviews

    Josh Butler

    I took one bottle of the isatori isa-test and was faithful to the directions, 4 pills before a workout or 4 before bed on non workout days.
    There’s really not a whole lot you can expect from a tribulus based product, but it is great that you only have to take it once a day. Also, the ZMA is included in this which is what sold me on it. Overall, I didn’t feel much of a difference at the gym, but I never really got sore either even after doing PT for the army in the morning, then hitting the gym at night. A good starter product for anyone who hasn’t tried a natty test booster.

  7. Rated 4 out of 5
    12 Reviews

    The 1

    ISA Test is a good product that will naturaly increase your Test level, while also increasing some GF. I could not tell super results, since I’ve tried many produts, but it does work well according to what level of training you are already at.

  8. Rated 4 out of 5
    12 Reviews

    mark jackson

    This product very good only took for month could feel myself getting stronger could probably taken for two months for better results. good product

  9. Rated 3 out of 5
    12 Reviews


    Product worked good during the first bottle, but when I started the second bottle as recommended I starting feelin aggressive and angry. I have stopped using and found my mood has changed.

  10. Rated 5 out of 5
    12 Reviews


    Isa Test is a really good test booster to help keep your test level up while lifting heavy to moderate weights.

  11. Rated 2 out of 5
    12 Reviews


    I did not feel any change with use of this product: no change in mood, strength, fit of clothes, body composition, acne, etc. I don’t expect much from test boosters, and this did nothing to change my opinion. I did not have blood work to substantiate the lack of results…it would have been purely academic.

  12. Rated 4 out of 5
    12 Reviews

    Raymond Gonzalez

    I tried Isatori Ida-test gf 104 capsules proctor was good help me with losing a little body fat felt like I got stirring well working out the only downfall is only 104 capsules and they want youto take every day you do the math don’t have enough for a month supply other than that okay product

  13. EZ

    Doesn’t work did nothing for me. Don’t recommend

  14. Rated 4 out of 5
    12 Reviews


    I am about half way through my cycle with this product. I like the effects I’ve leaned out, and it does help with energy levels in the gym. I’m not taking any other supplements in combination with this item. I’ve taken TX3 and I will go back to it after I’ve completed my use of ISA Test. I like the effects of TX and the D Asparticc Acid, However, this has been a good product overall. I do wish that manufacturers would drop the coolored capsules and simply go to clear gelatin capsules instead. There’s no need for the FD and C color dyes in my health products.

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