Irwin Naturals Testosterone UP Booster Review

Irwin Naturals Testosterone UP Booster Review


Irwin Naturals are the ‘Whole Foods’ of supplements, there packaging is green and evokes the great outdoors and their range of products cannot fail to look attractive to either the vegan/hippy sort or the more senior populace.

Now, there is both a massive grey and natural foods economy out there and these guys are really hitting both bases perfectly, however, looking a little deeper in to their lines I can actually see that many of these products are available in fitness stores everywhere – they’re just packaged differently.

So this brings me on to their Testosterone UP booster.

First look:

Like I said, this is cleverly aimed at the ‘Whole Foods’ market out there which is on the rise, and people are will to pay over the odds for the privilege of what is essentially a well packaged product.

It is all green, with images of leaves, grass and water – it screams natural and safe rather than edgy, potentially dangerous and illegal like the traditional bodybuilding products out there used to and still do in some cases.

 Check out our top 3 Testosterone Boosters

Ingredients: The Science

UP ingedients

What I can tell you immediately is that each daily serving is generous of ingredients, we are looking at just over 3000mg per day which is up there with the likes of TestoFuel and PrimeMale.

However, that is pretty much where the similarities end and it is these aforementioned two products that have set the benchmark for us.

But, we shall look a little more closely at the content so we can make a fair judgement.

What’s Good:

Zinc – Studies show that this has a link with healthy testosterone production. This is found in TestoFuel.

BioPerineThe extract of piperine, called BioPerine®  in the patented form, has been clinically tested in the United States.

BioPerine®  significantly enhances the bioavailability of various supplement nutrients through increased absorption.

GinsengAsian red ginseng has been used for centuries to strengthen the immune system, boost energy, and increase longevity. In studies, ginseng has increased testosterone levels in lab animals.

Pumpkin Seed Oil – Pumpkin seeds are great for Magnesium which is good for testosterone production.

Nettle Root – This plant contains beta-sitosterol, which helps elevate testosterone levels. Nettles have also been shown to significantly decrease estrogen levels, another proven strategy for raising serum testosterone. This is found in #2 T-Booster, PrimeMale.

What’s NO Good:

Copper – Whilst a good balance of copper can assist with fat burn, high levels of copper are correlated with low testosterone.

MCT – Now, I am not saying this is not good at all, over for your health it is okay but not for testosterone.

Plant Sterols – Good for reducing cholesterol but not much in relation to increase testosterone levels.

Tribulus – Don’t get me started on the mythical wonder plant that has never been proven to increase testosterone levels.

Longjack Extract – Eurycoma (Tongkat Ali, LongJack) is a pro-fertility agent and aphrodisiac that appears to have a large body of evidence supporting this role and some evidence suggesting it may be an anti-estrogen and pro-erectile agent.

However, there is a lack of evidence for testosterone boosting.

Chrysin – Laboratory research suggests that chrysin might increase testosterone but research in humans hasn’t found any effect on testosterone levels. The amount of chrysin that is absorbed from the intestine may be very small, which would make the effects unlikely.

Gamma Oryzanol – There is no reliable evidence to prove that Gamma Oryzanol has any benefit whatsoever.

Find out which ingredients work and which don’t
Testosterone boosting ingredients


3  liquid pills per day. This is not optimal.

We should have at least 4 doses throughout the day so our body can process the nutrients and make the most of them.


There are four testosterone boosting ingredients along with BioPerine which enhances their availability.

This is bordering on a ZMA product where the ingredients are limited and therefore offer testosterone support rather than being a complete booster.

There’s a nice, healthy amount of Zinc and Magnesium from the pumpkin seed with a nice hit from the Ginseng and Nettle.

It is important to say that the latter two, although fairly uncommon are present in PrimeMale which shows a degree of research as opposed to just copying another product.


Now, whilst I think that it is great to include 4 fantastic ingredients it actually contains several that do nothing to raise testosterone levels.

To me, that is a wasted opportunity to fill each pill with items that works and will have much more of an effect, as it stands you will barely notice anything and it would have to be stacked with other supplements whereby you could have just bought one product…

I also think that it is naive to include Tribulus too.

TestoFuel covers important ingredients such as D-aspartic Acid, Vitamin D3, B6, B12, K2 and has additional proven ingredients such as Fenugreek and Oyster Extract.

My Review Conclusion:

So almost half of the ingredients are shared with good testosterone boosters and then they went a little left-field and started to add ingredients that help fight against cholesterol…it’s at a juxtaposition, why would they bother with that?

The product is clearly m,marketed to stimulate testosterone production to go off course and add completely dissociated ingredients to the mix doesn’t sit right with me and as already said, it is a missed opportunity.

I can see their market and audience (and it’s booming), I just can’t see where they are heading with this product.

As in most cases, you are best looking past the packaging and appreciate what a product can actually do or not.

Our Favorite Test Boosters

> Increase Natural Testosterone Production

> Build Slabs Of Muscle

> More Energy

> Increase Strength

> Improve Overall Well Being


Ben BA(Hons), PGCert

Ben established this site to be a free resource in 2015. Since then it has gained over half a million visits. He has always been interested in sport and he started playing rugby at the age of 6 represented his town, county and school. Ben also enjoys cycling, has started skiing and is in the Army Reserve representing his Regiment as part of the 150 Regimental Shooting Team. He holds a bachelor's and postgraduate degree in sport exercise & nutrition.
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