The makers of Animal Stak have been around for a while, so we had to jump into the ingredients of this product to check out the “special sauce.” Next, we read some customer reviews on potential side effects of this testosterone booster – so we took a closer look to find the culprit (or culprits). Customers aren’t happy with the amount of pills in each serving, so we needed to review the scientific research – grasping desperately for a reason why this supplement requires so many capsules per dose. Finally, we summarized our findings to bring you the bottom line.
What is Animal Stak?
First of all, Animal Stak is a testosterone-boosting supplement designed to enhance strength and performance while naturally raising your testosterone levels. It’s called the “complete anabolic support stack” by the makers, promising a cutting-edge, non-hormonal product.
We’re curious to get into the ingredients here since you need to take so much of it with each dose. The combined ingredients in Animal Stak are extensive, including:
- Tribulus Terretris Extract
- Longjack Extract Complex
- Fenugreek Seed
- Stinging Nettle Root
- Maca Extract
- Mucuna Pruiens Seed
- L-Carnitine Fumarate
The list goes on. The very first thing we noticed, however, were the quality of some of the ingredients, which is a good start. These ingredients are supposed to naturally increase a man’s testosterone levels, while increasing energy and helping with muscle recovery.
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Animal Stak Directions
You’re instructed to take one pack of capsules per day for 3 consecutive weeks. Take it 30 minutes before your exercise on training days. On days when you aren’t training, take on an empty stomach, between meals.
For best results, you should cycle this supplement for three weeks on and take one week off.
The one issue that’s rarely mentioned in the directions is the number of capsules you’re supposed to take. One customer reported that there were eight capsules in each serving or “pack.” That’s a fistful of pills not many people are willing to down.
Animal Stak Ingredients
Here’s the part where we take a close look at the ingredients of the supplement. For this price, we want to make sure that the formula is proven to work – otherwise, you might as well just stack your money up and toss it out the window.
Tribulus Terretris Extract
This fruit-producing Mediterranean plant has been taken for years to enhance athletic performance, improve bodybuilding results in a post-cycle therapy or PCT program, as well as for a slew of other health benefits – including heart and circulatory conditions.
In a study by the Journal of Alternative and Complementary Medicine, Tribulus terretris extract was tested to show the benefits it had on sexual behavior and intracavernous pressure (ICP).
The study concluded, “The increase in ICP which confirms the proerectile aphrodisiac property of TT could possibly be the result of an increase in androgen and subsequent release of nitric oxide from the nerve endings innervating the corpus cavernosum.”
This ingredient is an herb, much like clover, and is also native to the Mediterranean region. You use fenugreek seed for a wide range of benefits, including upset stomach, constipation and inflammation.
Additionally, it helps treat menstruation issues, diabetes, erectile dysfunction, and obesity. 
The Iranian Journal of Pharmaceutical Research wrote, “Adjuvant therapy to the fenugreek seeds extract (with metformin) in PCOS women improved the sonographic results and menstrual cyclicity.”
Ihe International Journal for Vitamin and Nutrition Research carried out a study on 24 type-2 diabetic participants to “evaluate the hypoglycemic and hypolipidemic effects of fenugreek seeds in type 2 diabetic patients,” concluding that, “fenugreek seeds can be used as an adjuvant in the control of type 2 diabetes mellitus in the form of soaked in hot water.”
Stinging Nettle Root
As scary as this ingredient sounds – it’s not. Stinging nettle root is used for urinary issues, mostly.
In Greek times it was used as a laxative, while today it can be applied to the skin to treat aches and pains, oily hair, and even hair-loss.
There is some research out there backing this ingredient for its ability to relieve prostate enlargement, but nothing that backs this formula at all.
Longjack Extract Complex
Longjack, or Eurycoma longifolia, is an evergreen shrub tree native to Southeast Asia. This ingredient is used in Malasian medicine for its potential benefits on sexual performance.
The Journal of the International Society of Sports Nutrition conducted a study on 63 participants to see if Eurycoma longifolia could improve stress hormone profiles.
They concluded that, “…daily supplementation with tongkat ali root extract improves stress hormone profile and certain mood state parameters, suggesting that this “ancient” remedy may be an effective approach to shielding the body from the detrimental effects of “modern” chronic stress, which may include general day-to-day stress, as well as the stress of dieting, sleep deprivation, and exercise training.”
Maca has been cultivated as a vegetable crop for over 3,000 years in Peru. Closely related to the radish, maca is taken to fight fatigue and enhance athletic performance, stamina and memory.
In a systematic review by BMC Complementary and Alternative Medicine, researchers wrote, “The results of our systematic review provide limited evidence for the effectiveness of maca in improving sexual function. However, the total number of trials, the total sample size, and the average methodological quality of the primary studies were too limited to draw firm conclusions. More rigorous studies are warranted.”
While some of these ingredients are backed by research, which we love, it doesn’t tell us much if there’s no scientific evidence on the formula – which we don’t love.
Animal Stak Side Effects
Here is where we dive right into the potential side effects of the product to see if the juice is worth the squeeze, or in this case if the testosterone booster is worth the price tag.
First, the side effects mentioned by customers included:
- Erection Problems
There is also a chance that testosterone supplementation could shut down users’ hypothalamic-pituitary-testicular axis, or HPTA.
It’s important to note that everyone is different and reacts differently to specific ingredients. Just because some users had a negative experience, doesn’t mean you will too.
With that being said, let’s take a look at the possible side effects of some of the ingredients:
Not getting a full night’s sleep can decrease sex drive – counterproductive for a supplement claiming to increase your sex drive.
Stinging Nettle Root
WebMD says that Stinging Nettle is “possibly safe” when taken by mouth up to 2 years. Beyond that – you’re on your own. Possible side effects can include:
- Upset Stomach
The site also mentions that there is “some evidence stinging nettle above ground parts can decrease blood sugar levels. It might increase the chance of low blood sugar in people being treated for diabetes.”
This ingredient is possibly safe when taken by mouth in larger amounts (three grams per day for four months).
Maca contains goitrogens, substances that could disrupt the normal function of the thyroid gland. If you have a pre-existing thyroid condition, this isn’t for you.
This amino acid is produced naturally by the body, but if taken in a supplement, there are some potential side effects to worry about.
- Upset Stomach
WebMD also says that this amino acid is more likely to cause seizures in people who are prone to have them or who have had them before.
Animal Stak and Animal M-Stak
Animal Stak is an overall boost of testosterone for those seeking to up their energy levels and libido, while also wanting to lose fat and gain muscle. This is especially good for people over 35 whose testosterone levels are failing.
Animal Stak also contains a hormone amplifying blend containing l-carnitine and agmatine sulfate, intended to optimize how well your testosterone works.
Animal M-Stak, on the other hand, is a revamped formula intended specifically for bodybuilders and those seeking to make large muscle gains. If you need to boost your testosterone for muscle, Animal M-Stak is a better choice and leads to good results for body composition.
However, Animal Stak, contrasted with the M equivalent, contains zinc, magnesium, and vitamin D3. Research has shown that these three component are very useful when wanting to increase one’s testosterone levels.
Let’s get into something a bit more positive here. Animal Stak claims to deliver a host of benefits including:
- Natural Testosterone Boost
- Improved Muscle Size
- Increased Energy
- Enhanced Libido
While the claims are certainly there, we want to know what the customers are saying. Our research team read through dozens of online reviews and found that most users see results. This isn’t too shocking considering that some of the ingredients, like tribulus terretris extract and fenugreek seed extract, do work.
Increased Muscle Mass and Strength
We review supplements, so it was a no-brainer to at least touch on the potential benefits this supplement can have on your muscle mass and strength.
Tribulus terrestris has been shown to boost testosterone levels by “attenuating the luteinizing hormone or the follicle stimulating hormones” and has been shown to help increase muscle size and strength.
The Journal of the International Society of Sports Nutrition carried out a controlled trial testing the effects of Fenugreek on 49 men. It concluded that “500 mg of this proprietary Fenugreek extraction had a significant impact on both upper- and lower-body strength and body composition in comparison to placebo in a double blind controlled trial. These changes were obtained with no clinical side effects.”
There are some well-researched ingredients in this t-boosting supplement, but without knowing the exact formula, it’s impossible to prove that it works beyond a couple of specific ingredients.
So while there is some positive talk of results, the majority of the complaints were for the number of pills they require you to take and the overall customer service of the company.
It’s a shame – if you’re going to use ingredients backed by science, why not deliver excellent customer service and a supplement that’s easy to take?
Animal Stak Price
Now seems like a good time to jump into the cost of this performance-enhancing supplement. In this case, it’s fairly reasonable. It sells on the official website for around $43.00. You can also find a variety of supplements on Amazon for around the same price.
Universal Nutrition sells this product, but unfortunately, we couldn’t find anything about free samples, trial packs or money-back guarantees on the website.
Where to Buy
Amazon.com has a broad variety of both animal stak and animal M-stak in stock.
GNC also stocks animal stak, but only of the M variety.
Animal Stak Alternatives
As far as testosterone boosters are concerned, there’s no shortage of alternatives out there. If you’re looking for something in the same realm, but don’t feel like taking a handful of pills – there’s something else out there for you.
Some other t-boosters and growth hormone supplements are:
Always research a product before buying it – we found some minor issues with those other products as well, like side effects and lack of results. It’s also important to keep in mind, what doesn’t work for others could still work with you. Know your body and know your limits.
What Users Are Saying
“Animal Stak is the best Testosterone booster that I have taken. I have been taking them for over a week and started feeling the effects after 3 days. Many Testosterone boosters I have paid a lot of money for and have felt no difference. With Animal Stak, I am lifting better and getting better body definition. If you are middle age this product will give you extra strength in the gym and in the bedroom.”
“I didn’t feel much of a difference in terms of lifting capability from the use of this product. It did help give a mental boost in thinking I could do more. It was also a lot of pills to have to take.”
“Animal Stak is absolutely worthless. You would be better off taking a sugar pill. I experienced absolutely nothing while taking this.”
The Bottom Line – Does Animal Stak Work?
So are we telling you to run out and buy some Animal Stak to increase your strength, testosterone levels and overall performance? There are some key factors here that we like, for example, a couple of ingredients in the formula are effective. We also thought the price was pretty reasonable – but the buck stopped there.
We couldn’t get past:
- Super high doses – wow
- No scientific research on the formula – bummer
- No money-back guarantee or discounts on the official website – ouch
If you want to boost testosterone levels, increase energy and improve overall performance, we suggest a product with proven ingredients and amazing customer service.
Among the best products we’ve found this year is the supplement Boost. It’s a blend of nine ingredients. All clinically-tested with results showing help improving testosterone levels, strength, energy and more.
Also, they’re convinced you’ll love the supplement, so they’re offering a 120-day money-back guarantee and multiple-bottle discounts.Learn More About Boost »