TestoTEK: Scientific Review on Ingredients, Dosage, and Side-Effects
Review of: TestoTEK by TEK Naturals
Some proven ingredients
Generally safe, but some possible side-effects
Higher price point
Summary: TestoTEK is an all-natural, herbal testosterone booster that aims at helping men achieve optimal hormonal balance. It contains a powerful micronutrient blend with vitamin D, vitamin K2, and zinc all having evidence to support a positive influence on T. The research behind TestoTEK's primary ingredient, D-Aspartic acid, however shows mixed results.
Verdict: All-in-all, supplementing with TestoTEK may help with natural testosterone enhancement. That being said, there are superior alternatives out there.
DOES TESTOTEK WORK?
TestoTEK contains some proven vitamins and minerals that can help ramp up your testosterone levels if you're currently deficient in them. But out of its six primary herbal ingredients, only one of them (mucuna pruriens) has strong evidence supporting a positive influence on T.
So to answer the question:
TestoTEK may work at boosting testosterone.
But don't expect TestoTEK (or any other dietary supplement for that matter) to work without implementing particular changes in diet and lifestyle as well. As much you may want to believe in a magic-pill, the truth is that it doesn't. Long-lasting improvements in health can only be accomplished by making long-term changes in how you eat, move, and sleep.
TESTOTEK DETAILED REVIEW
My aim is to provide you with the information required to make an informed decision before purchase. The bulk of my TestoTEK review is centred on the scientific research on its ingredients. My attempt is to answer the question of whether each ingredient is actually clinically validated to be effective at boosting testosterone.
I've also gone over some customer feedback and what I think of the price, but these factors should not be given nearly the same amount of weight as my ingredient analysis.
TestoTEK contains the following ingredients:
- Vitamin D3 (2000IU)
- Vitamin K (50mcg)
- Vitamin B2 (20mg)
- Vitamin B6 (50mg)
- Vitamin B5 (10mg)
- Zinc (25mg)
- D-Aspartic Acid (2000mg)
- Mucuna Pruriens (175mg)
- Stinging Nettle Root Extract (100mg)
- Fenugreek Seed Powder (75mg)
- Oyster Body Extract (70mg)
- Eluethero Root Powder (50mg)
Let's now breakdown the scientific research behind each one of these.
Vitamin D3 (2000IU)
Vitamin D plays an important role in over 1000 bodily functions. Maintaining the health of your bones, keeping your immune system stimulated, regulating your blood glucose levels, and supporting lung function are just a few of the many ways that vitamin D influences your overall health and well-being.
As it turns out, vitamin D has also been shown to have a direct influence on testosterone:
- In a cross-sectional study of 2299 men, researchers found that the men with sufficient vitamin D levels had significantly higher testosterone and significantly lower SHBG compared to the men with deficiencies (1).
- In another study, researchers randomly assigned each of their 165 participants to receive either 3332IU of vitamin D or placebo over a 1-year period. At the end of the study, the men supplementing with vitamin D had 25% higher total testosterone levels compared to placebo (2).
- After analyzing the data from the Longitudinal Aging Study Amsterdam, researchers found vitamin D levels to be significantly correlated with testosterone levels in men (3).
The research is very clear on vitamin D's significance to maintaining optimal T.
TestoTEK contains 2000IU of vitamin D. This is enough to maintain your vitamin D levels, considering that you're already sufficient in it. But if you're looking to correct a deficiency, it is recommended that you dose with anywhere from 5000-10000IU daily.
Vitamin K (50mcg)
Vitamin K's most prominent function is to regulate blood clotting, which makes it very important for repairing wounds. Maintaining optimal levels of vitamin K also improves the transport of calcium throughout the body, which greatly reduces your chances of bone resorption and fracture. It has also been shown to reduce your chances of developing cardiovascular disease.
Vitamin K is actually an umbrella term which includes all of vitamins K, K1, K2, and K3. The type within TestoTEK is K2 (menaquinone). Although there is not much evidence on K2's influence on testosterone levels in humans, there is some encouraging animal research:
- In a Japanese study, 8-week old male Wistar rats were given 75mg/kg of vitamin K2 for 5-weeks, after which they experienced a testosterone increase of upwards of 50% (4).
- In another study, researchers found vitamin K deficient rats to experience significant decreases in testosterone compared to the rats who were given the vitamin. Researchers concluded that a vitamin K deficiency leads to a reduced expression of the genes responsible for converting cholesterol into testosterone (5).
Although vitamin K2 is shown to increase testosterone levels in rats, we cannot say whether the impact carries over in humans to quite the same extent. Nonetheless, vitamin K2 is a very important nutrient for the human body and the 50mcg dose in TestoTEK is a plus point.
Vitamin B2 (20mg)
Vitamin B2 is an important nutrient that performs largely as an antioxidant. Some of its key roles include energy metabolism, preventing free radical damage, maintaining skin health, and contributing to proper human development and growth. There is no direct association between vitamin B2 and testosterone, and deficiencies are quite rare in the west, but nonetheless the 20mg dose in TestoTEK doesn't hurt.
Vitamin B6 (50mg)
Vitamin B6 is used by your body to help manage movement, energy expenditure, and blood flow. Furthermore, B6 also stimulates the nervous system and maintains a balance of hemoglobin in the blood. B6 deficiencies are rare in the West. If you're getting enough calories, chances are that you're also getting enough B6.
Vitamin B5 (10mg)
Vitamin B5 is a nutrient that's contained within every single cell in the human body. Some of its primary functions include converting energy from food, managing blood glucose, managing blood pressure, and reducing bad cholesterol. Again, B vitamins are present within nearly all food and therefore deficiencies are quite rare.
Zinc is a trace metal that is vitally important for proper human growth and development. Balanced hormones, increased immunity, and improved digestion are just a few of the many benefits associated with maintaining optimal levels of zinc in the body.
Zinc is lost through sweat, so if you're an athlete, supplementing with zinc can be especially important. Zinc's influence on testosterone is dependent on your current zinc levels. Let's take a look at some research performed in this area:
- Experienced wrestlers were given a daily dose of 3mg of zinc per kg of bodyweight during training. Researchers found that the strenuous exercise caused a decrease in T for the wrestlers, but that supplementing with zinc prevented the drop (6).
- In a cross-sectional study, researchers observed a variety of subjects before, during, and after a zinc deficiency. They found zinc levels to be a significant predictor of testosterone. Dietary zinc restriction led to a significant decrease in T, while zinc supplementation led to a significant increase in T (7).
- In another study, the amount of zinc subjects supplemented with was directly correlated with their baseline levels of testosterone (8).
Zinc is a very important nutrient for men, and maintaining optimal levels of it is very important to ensure optimal testosterone production. The 25mg dose of zinc in TestoTEK provides over 200% of your daily serving.
D-Aspartic Acid (2000mg)
D-aspartic acid is an amino acid that's naturally present in the human body. It is an ingredient that's common amongst many of the best-selling testosterone boosters on the market. The efficacy of its influence on testosterone, however, is questionable. Let's quickly go over the findings:
- 42 healthy men given a daily dose of 3.12g of D-AA experienced a 42% increase in total testosterone after just 12-days (9).
- 20 resistance-trained men given a daily dose of 3g of D-AA for 28-days experienced no significant fluctuations in T-levels (10).
- Infertile men given 2.66g of D-AA daily for 90-days experienced an average increase of 30-60% in total testosterone levels (11).
- 24 resistance-trained men were given either placebo, 3g, or 6g of D-AA daily for 1-month. Surprisingly, the 3g group experienced a 2% decrease in free testosterone and the 6g group experienced a 15.3% decrease. Placebo, on the other hand, actually experienced a 9.4% increase (12).
As you can see, D-aspartic acid has a lot of mixed evidence surrounding its effectiveness as a test booster. Each one of the four studies cited above revealed different results. That being said, it does seem effective at boosting testosterone in men who have very low T to begin with.
At a 2000mg dose, D-aspartic acid is TestoTEK's primary ingredient but, based on the current stage of research, we cannot be sure whether it actually works.
Mucuna Pruriens Seed Extract (175mg)
Mucuna Pruriens, also known as velvet bean, is a tropical legume that's native to India and parts of Africa. The active ingredient in it is L-DOPA, a precursor to dopamine. As you might know, dopamine is the hormone responsible for the regulation of our pleasure-reward system. Dopamine balance is extremely important to ensure that our emotions remain stable. Too little of it, and you'll be left feeling depressed, unfocused, and lethargic. Too much, however, and you're prone to addiction and involving in impulsive behaviour.
Let's take a quick look at the research on mucuna pruriens' impact on testosterone:
- Infertile men given 5g of mucuna pruriens seed powder for 3-months experienced an average increase of anywhere from 27-38% in total testosterone levels (13). Similar results were replicated in another study as well (14).
- In a sample size of 60 infertile men, 5g of mucuna pruriens supplementation allowed them to experience a significant decrease in cortisol levels (15). Testosterone was not a measure taken in this experiment, but lower cortisol almost always translates to higher T.
Mucuna Pruriens' impact on the testosterone levels of otherwise healthy men is limited in research. As for its impact in infertile men, who have very low T to begin with, the impact seems significant.
The 175mg dose of mucuna pruriens in TestoTEK should allow you to experience increased feelings of joy, calm, and focus.
Stinging Nettle Root Extract (100mg)
Stinging nettle is a plant that gets its name from the irritation and rashes it causes upon skin exposure. The root of this plant has been used for centuries to treat urination problems, prostate conditions, joint ailments, and as a diuretic. As per its effects on testosterone, let's take a quick look at the research:
- In a study of 558 patients suffering from benign prostatic hyperplasia, each subject was given a daily dose of 120mg of stinging nettle thrice daily for 6-months. No significant fluctuations in testosterone were noted (16).
The above is the only human study I was able to find on stinging nettle's impact on T-levels in humans. There is some evidence found in rats (17), which shows stinging nettle to elevate testosterone. There is also some test-tube research (18), which shows anti-aromatase effects. But based on the lone human study, stinging nettle doesn't seem to boost T in humans.
The 100mg dose of stinging nettle root extract in TestoTEK is a drawback because there is insufficient evidence regarding its effectiveness.
Fenugreek Seed Powder (75mg)
Fenugreek is a herb that has been used in India and parts of Arabia for its apparent male enhancement benefits. Fenugreek is a very common ingredient in test booster supplements, but is it actually proven to boost T? Let's find out:
- In a study of 30 resistance-trained men, a daily dose of 500mg of fenugreek was enough to increase bioavailable testosterone levels by an average of 12.26% (19).
- In another study that used a similar sample size as well as the same methods as the one above, subjects experienced a 10% decrease in free testosterone levels (20).
The evidence surrounding fenugreek's influence on testosterone is inconclusive. The 75mg dose in TestoTEK may help you experience an increase in libido (21), but the impact on testosterone is not likely to be significant.
Oyster Body Extract (70mg)
Oyster body extract is derived directly from oysters. It's basically a dried up form of the animal with the nutrients kept intact.
The primary benefit that oyster body extract can provide for your testosterone levels is through its zinc content. Given that TestoTEK already provides 25mg of zinc, I find the 70mg dosage of oyster extract to be unnecessary.
Eleuthero Root Powder (50mg)
Elutherococcus senticosus, commonly referred to as Siberian ginseng, is an adaptogenic herb that has traditionally been used to help combat fatigue. There is some evidence to suggest this herb's ability to improve physical performance (22) and increase endurance (23). As per its effects on testosterone, there is only one human study (24), and the results show that Siberian ginseng actually decreased T and increased cortisol for club-level endurance athletes.
Although Siberian ginseng may provide benefits for overall health, its impact on testosterone is severely understudied. The lone human study, though, shows that it might actually decrease T.
At the time of this writing there are 32 customer reviews of TestoTEK on Amazon that average out to a rating of 3.5/5 stars.
5 star reviewers write that the test booster was able to provide them with more energy and stamina and that it worked as advertised.
1 star reviewers write that it did nothing for them.
Either way, you've gotten a glimpse at the science behind this supplement's effectiveness and can, at this point, decide based on science rather than anecdotes whether it will actually be effective for you or not.
TestoTEK is definitely a higher priced supplement compared to the average testosterone booster on the market.
TestoTEK contains an all-natural herbal formula that is most likely safe for consumption. That being said, any health supplement you use can cause possible side effects. If you suffer from any pre-existing conditions, it's best to consult with a health care practitioner before use.
Possible Side Effects of D-Aspartic Acid
Possible Side Effects of Mucuna Pruriens
Possible Side Effects of Stinging Nettle
Possible Side Effects of Fenugreek
Possible Side Effects of Siberian Ginseng
HOW DOES IT COMPARE?
For this portion of the review, let's see how TestoTEK stacks up against some other in-demand test boosters.
TestoTEK vs Prime Male
Prime Male contains a very similar ingredient profile to TestoTEK. Both supplements start off by providing a hefty dose of vitamin D. Prime Male, however, delivers 5000IU of it compared to TestoTEK's 2000IU. Both supplements provide about the same amount of vitamin K2.
Unlike TestoTEK, Prime Male also packs in some magnesium, which is a proven test booster. As for primary ingredients, they are more or less the same. D-Aspartic Acid is 400mg higher in TestoTEK, while mucuna pruriens is 125mg higher in Prime Male.
Both these supplements are very similar, but Prime Male comes out on top due to its superior vitamin and mineral formula.
Winner: Prime Male
TestoTEK vs Testogen
Like TestoTEK and Prime Male, Testogen's active ingredient is also D-aspartic acid. After reading about D-AA above, you might be wondering why supplement companies continue to add it even though it has insufficient evidence regarding its test boosting abilities. My best guess is probably because they're keeping up with the trends. One company adds it to their product, it sells well, and all the other companies copycat.
Testogen does not contain any micronutrient support, but it does pack in some tribulus, which can help boost libido.
Overall, TestoTEK is the superior supplement.
TestoTEK vs TestoFuel
TestoFuel is yet another test booster with D-AA as its active ingredient. TestoFuel also packs in a proven vitamin and mineral formula that can support your T. Vitamin D is included at a dose of 5000IU, with zinc and magnesium included at 10mg and 15mg respectively.
Along with D-AA, TestoFuel also packs in some Asian ginseng, fenugreek, and oyster extract as its main herbal ingredients. In other words, it is more or less the exact same supplement as TestoTEK. The dosages is where the two supplements differ.
TestoFuel comes out on top due to its superior micronutrient formula, since TestoTEK missed out on including magnesium.
TestoTEK vs Nugenix
Nugenix has been on the market for a while. It is stocked on GNC shelves around the world and continues to sell well as a test booster. However, when we take a look at its ingredients, not a single one has proven benefits for T-production.
The primary ingredient in Nugenix is L-citrulline malate. This is a nitric oxide enhancer rather than a T-booster. Although citrulline improves blood flow throughout the body, there's no saying how it impacts male hormonal health.
Nugenix also includes fenugreek and tribulus within its proprietary blend. Both of these ingredients may enhance libido, but their effects on T are negligible.
TestoTek definitely comes out on top in this case.