Irwin Naturals Testosterone Up Review | Side Effects | Dosage | Ingredients

Testosterone Up Review | Side Effects | Dosage | Ingredients | Pros & Cons

Irwin Naturals might not be a well-known name in the supplement industry, but they have been putting in a lot of work to create a number of products, and one of them is Testosterone Up.

In this review, we’ll discuss some of the most frequently asked questions regarding testosterone Up. Such as, are there any side effects? What’s the correct dosage? What other customers are saying? Including the most important, the ingredients profile.

Let’s dive right in!

Pros and Cons of Testosterone Up

Here we have the pros and cons of Testosterone Up by Irwin Naturals. It contains a handful of positive ingredients that are linked to stimulating testosterone production, but just as many that have no use whatsoever when it comes to increasing the powerful hormone testosterone.


  • Uses zinc – ideal for higher t-levels (the dosage might be too high for sensitive people)
  • Contains Asian Ginseng which has been used for centuries to help boost sex drive


  • Contains Tribulus which could aggravate the prostate
  • May aggravate the stomach
  • Contains ingredients that are not linked to increasing testosterone

Dosage | How To Use

As there is no actual dosage advice given by the makers of testosterone Up, Irwin Naturals (slightly suspicious), we can only assume the dosage is once a day taking 3 capsules per time.

However, some customers report side effects such as a racing heart and anxiety after taking 3 capsules in one go. It’s suggested to spread out the dosage throughout the day to test your tolerance.

Testosterone Up  Ingredients

As you can see from the list of ingredients, testosterone Up contains very few ingredients that will boost your testosterone. 

For starters, it only has a small amount of ginseng at 100mg. The optimal dosage for Ginseng is between 400-1,000mg as a T-enhancer. 200mg is the minimum effective dose. See more on Ginseng here; Ginseng’s Effects on Your T-Levels.

On the other hand, Irwin Naturals Testosterone Up contains a high dose of zinc – 30mg. While this is a tolerable dose for most people, some might experience nausea, cramps, vomitting, and severe stomach discomfort for hours. The optimal dosage for supplementing zinc is around 20mg daily.

It’s not all bad though!

If you are someone who’s concerned about your overall health, then good news. There’s been positive reports linked to nettle, and pumpkin seed oils for helping the blood flow. The better your blood flow, the more likely you are to have better testosterone production. See my in-depth article on stinging nettle here; How Stinging Nettle Boosts Your Testosterone.

[dropshadowbox align=”none” effect=”raised” width=”auto” height=”px” background_color=”#ffaaaa” border_width=”1″ border_color=”#dddddd” ]Warning, testosterone Up contains Tribulus. When Tribulus is taken for long periods of time, it can aggravate, and cause the swelling of your prostate – something you’ll want to avoid.[/dropshadowbox]

Unsure which supplement to choose? See our testosterone enhancer guide here

Ingredient Breakdown

ZincNo testosterone booster should be without this ingredients. It’s directly linked to stimulation testosterone levels, increasing energy production, and healing the body. It also helps you build muscle, too. [1, 2] Want to know more about zinc? Follow this link; Everything About Zinc and Testosterone.

testofuel ingredients zinc

Copper – This mineral has been shown to slow down bone loss, and improve the treatment of Alzheimer’s patients. However, it shows no signs of improving testosterone levels, making it useless as a T-boosting ingredient.

“While vital, it appears to be sufficient in the human diet and water supply with little evidence concerning its usefulness as a supplement.”

MCT – Medium-chain triglycerides are a class of saturated fat composed of fatty acids containing 6-10 carbons. They are found primarily in coconut oil, palm kernel oil, and dairy fat, and they appear to benefit fat loss to a minor extent when consumed in place of other dietary fat. [3]

Pumpkin SeedThis healthy seed can help treat numerous illnesses, as it contains powerful fatty acids, which are vital for good health and vitality. However, there has been no direct link to the use of pumpkin seeds and increasing testosterone levels. [4]

Nettle – Stinging Nettle is not only a plant that causes stings and skin irritation, it’s also used for oral consumption. Even though it has been used to treat illnesses such as the common cold, it’s not your most potent T-enhancer. But it can help to reduce prostate size and swelling. [6]

Other Ingredients

Plant Sterols – Plant sterols will lower LDL Cholesterol, but they will not increase testosterone. Perhaps it will have the opposite effect, as even a little bit of cholesterol is vital for increasing testosterone levels. [5]

Tribulus – This adaptogen has been used widely around the world for centuries to treat men with low libido. While it does work, it’s advised to be very careful with the length of time you supplement with tribulus, as it could cause the enlargement of your prostate.

Ginseng – Asian ginseng will lift you up mentally, and physically. It will also help to raise your testosterone levels. It’s a no brainier when considering the use of ginseng, we highly recommend it. [7]

testofuel ingredients Asian-red-panax-ginseng

LJ100 – Longkag Ali may reduce the amount of estrogen flowing through your body, which could be good if you are a man that deals with large amounts of stress. But as a testosterone booster, there have been no studies to show it’s beneficial in this department. [8]

Chrysin – This is a compound that is originally found in propolis (extracted from bee hives). It can increase testosterone levels, but only when injected directly into the testicles, otherwise it’s difficult to absorb into the body.

Gamma – Gamma will lower your cholesterol, but it will not boost your testosterone levels.

BioPerine – AKA, black pepper is well known to help the absorption of other ingredients which makes it a good addition to any supplement containing multiple ingredients. Want to know more about Bioperine? See my Bioperine article here; Will Bioperine Raise Your Testosterone Levels? Find Out!

Prime Male Testosterone Booster Bodybuilding Review

Testosterone Up Side Effects

Irwin Naturals Testosterone Up side effects – are there any?

While there haven’t been any serious side effects associated with testosterone Up, a word of caution should go in the direction of Tribulus – this ingredient could cause prostate issues in the future.

Unless you want a visit to your doctors where they examine your prostate, then be careful with the use of Tribulus.

Other people have also reported racing heat and anxiety issues, along with stomach pains.

People are reporting: 

  • Headaches
  • Jitters
  • Nervousness
  • Stomach problems
  • Sleepiness

Can Low Cholesterol Cause Side Effects?

As I said, Irwin Naturals Testosterone Up contains an ingredient called Gamma. Gamma reduces cholesterol levels in your body.

This is not only detrimental to testosterone production, but can also cause other negative side effects. You need optimal cholesterol levels in order for your body to function as it should.

Further Read: Testosterone Guide – All You Need to Know About the Male Hormone

What Others Say (Amazon Customers)

This product is great! But I would like to offer some precautionary advise to other users. Please take your age into consideration when taking these. These pills will cause your heart rate to elevate. If you take three pills and you’re maybe 35, you’re probably taking too many pills.

Just take one. The only time you’d need to take three is during the more private moments of life. As you age, take more pills for hormonal balance but don’t exceed the maximum three pills recommended. – Kyle Hursh (Amazon Customer) 

No, it doesn’t make you feel more manly, no it doesn’t magically make you stronger. It just gives me a stomachache and the feeling that I’m putting some synthetic/artificial chemical in my body that isn’t supposed to be taken that way….- Matthew (Amazon Customer) 

testosterone up definitely improved my manhood and muscle definition, but I didn’t sleep for two to three days after making 3 daily pills routine (one in the morning, afternoon, and evening). I had to completely stop taking this stuff to sleep. I then tried taking just one in the morning. Still can’t sleep. Paul M. Morgan (Amazon Customer) 

Conclusion | Testosterone Up

Testosterone Up is a confusing supplement. It contains ingredients that have been linked to increasing testosterone production such as ginseng, and zinc, but then on the other hand, it has ingredients that could possibly reduce testosterone levels. Such as Gamma, which reduces cholesterol.

Without enough cholesterol in our bodies, it will be impossible for testosterone levels to increase past their current amount. This is why it makes no sense as to why testosterone Up contains an ingredient that promotes the reduction of cholesterol.

It also contains Tribulus, which is notorious for causing prostate enlargement in some men. It now makes sense when we see people typing “Irwin Naturals Testosterone Up side effects.”

Overall, it’s an okay supplement for general health and energy, and possibly a small spike in sex drive via Tribulus, but will it improve the amount of free flowing testosterone you have over a long period? We think not!


[showhide type=”links” more_text=”Show References” less_text=”Hide References”]

[1] Zinc status and serum testosterone levels of healthy adults.

[2] Effects of a Novel Zinc-Magnesium Formulation on Hormones and Strength.

[3] Weight-loss diet that includes consumption of medium-chain triacylglycerol oil leads to a greater rate of weight and fat mass loss than does olive oil.

[4] Consumption of Plant Seeds and Cardiovascular Health: Epidemiologic and Clinical Trial Evidence.

[5] Plant Sterols and Stanols: Their Role in Health and Disease.

[6] Ameliorative effects of stinging nettle (Urtica dioica) on testosterone-induced prostatic hyperplasia in rats.

[7] Effects of Panax Ginseng C.A. Meyer saponins on male fertility.

[8] Effects of Eurycoma longifolia on Testosterone Level and Bone Structure in an Aged Orchidectomised Rat Model.


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