Premium Nutraceuticals International Black OxyTHERM Pre Workout Review

Premium Nutraceuticals International Black OxyTHERM Pre Workout Review

Premium Nutraceuticals International Black OxyTHERM Pre Workout Review First Look:

I was due to play rugby on the Saturday just gone, and it was the first time I will have played in approximately 5 or 6 months.

Having done no training whatsoever and very little running I thought an option may be to trial a pre workout for the game.

I arrived late to the game due to having some personal admin to sort out but I arrived in time to watch the first half in the cold wind and rain.

Knowing there was approximately 25 minutes left of the first half I decided to pop two of the pills from the condom looking foil sachet.

Then I waited for my turn to get on the pitch and hopefully cause some damage.

I have already taken a close look at OxyTHERM from PNI beforehand, however, this is the ‘Black’ edition and has a slightly different ingredient profile.


RELATED: We’ve tried and tested the best pre-workout supplement HERE!

Caffeine – This can assist with endurance, tested athletes saw an edge from caffeine in scientific studies. In some trials, the stimulant boosted athletes’ speed. In others, it helped them last longer before they spent all their energy.

Caffeine also raises the metabolism which means you burn more calories. Some studies show that it can curb soreness after exercise, too. This means you could get back to your training sooner and training means more calories burnt. This is present in all 3 of our Top Fat Burners.

Caffeine Anhydrous is the purest form so always look for that.

Yohimbe – Related to Yohimbine, Yohimbe is a powerful stimulant and used to increase fat loss as well as assist with erectile dysfunction. Can cause a host of other problems though, this is in our supplements to avoid list.

Supplementation with yohimbine combined with resistance training does not significantly alter the body mass, muscle mass, or performance indicators.

Dandelion (Taraxacum officinale) – Full of vitamins but not a great deal of human research to suggest that it can suppress appetite or lower blood sugar levels.

Panex (Korean) Ginseng – This form of Ginseng is the most highly researched.

There’s lots of evidence which suggest cognitive function, mood and immunity is increased, however, although there is evidence for better erections and an increase in testosterone production for infertile men.

It can also improve cognitive function.

L-Dopa (Macuna Pruriens) – This is actually good for treating people with Parkinsons. There’s a mixed bag of results for testosterone but look mainly positive.

Results have shown an increase in testosterone levels in infertile men, however, results are very limited for fertile men.

It is effective to reduce cortisol levels – high stress levels can harm testosterone production.

Molybdenum – Although it is toxic in anything other than small quantities, molybdenum is an essential element for animals and plants.
There are about 50 different enzymes used by plants and animals that contain molybdenum.

Methylsynephrine (Oxilofrine, p-hydroxyephedrine) – A banned substance that can cause cardiac arrest. You can read more about it here and here.


We are told to have 2 pills per 24 hours.

This is a combined amount of 1564mg.

This isn’t much at all and is a hell of a lot smaller than some pre workouts which offer up to and over 20g.

Being pills this didn’t offer any flavor or refreshment.

Benefits & Effects:

One thing that was quite beneficial was how easy it is to pop a pill rather than having to mix a powder with water and then chug it back.

Sometimes that can leave me feeling bloated and uncomfortable which is not ideal before you play sport.

Then we have the ingredients.

Caffeine is a great stimulant that can effect the CNS which controls muscle and heart stimulation.

Yohimbe is also a powerful stimulant. Yet, it is not without it’s issues.

Korean Ginseng can improve cognitive function, testosterone levels and erections…if that is what you want in the middle of a rugby game.

L-Dopa can reduce inflammation and may increase testosterone levels in men who are infertile.

How Did It Feel?

Ummmm it took me a bit by surprise if I am honest…

It took about 20 minutes to take action but once it did, it left my heart racing and my cheat feel like it was pulsating.

I then felt a bit sick, it was quite unpleasant and I found it uncomfortable to run around feeling like that.

It also made me feel like I needed a big shit.



There’s not many ingredients and is a bit under dosed compared to the best.

A proprietary blend which hides the exact amount of each ingredient contained is also present.

While Yohimbe is a powerful stimulant and fat burning ingredient, it can cause such a lot of health issues I am always wary of trying a supplement which contains it.

Then there is Methylsynephrine which can lead to a cardiac arrest…this is how I felt. I thought I was going to keel over.

Methylsynephrine is also a banned substance so if you play professional or even semi-professional sport you may get in to trouble, that is if you aren’t dead.

Then there’s Molybdenum which can be toxic in the wrong dose, considering this is a proprietary blend we have no idea how much or little is included.

Dandelion isn’t going to offer much benefit and L-Dopa is only effective at raising testosterone if you are an infertile man.

Premium Nutraceuticals International Black OxyTHERM Pre Workout Review Conclusion:

I have experienced quite a few different stimulants over the years…

Yet this is the first pre workout whereby I felt very uncomfortable because my heart was racing so hard.

This is no doubt down to the inclusion of Yohimbe and Methylsynephrine which are both potentially very harmful.

Then there’s the risk of toxicity from Molybdenum if dosed to high, obviously this being a proprietary blend we have no idea if there’s a trace amount or 150mg.

We also have L-Dopa which is only effective for any infertile males who only make up 12% of the global male population which is a fairly niche market, especially when you consider this pre workout only consists of several ingredients.

There is a better product than this that will get you fired up and cause hell in your chosen sport but I found this to be more problematic than it was worth.



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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