ProSupps is an American supplement company that was founded in 2004. It has a huge range of products including BCAAs, Glutamine, Creatine, Whey Isolate, and many others. The supplement we are going to look at today is Mr Hyde Pre Workout.

It promises an intense energy boost, and with over 400mg of caffeine contained within each serving it definitely lives up to that promise.

In this article we are going to take an in depth view of the ingredients list, and assess the effectiveness of them. The supplement is split into four different sections.

There is Niacin (25mg), then there is a Strength Matrix, a Caffeine Matrix, and an Intensity Matrix. We will take a look at each in turn.

Ingredients List Review

There are too many ingredients to look at each one individually (14 to be specific), so instead we will look at each individual Matrix.

We will also look at the first ingredient that is on the list, and the only one that is not part of a Matrix – Niacin.

• Niacin (25mg) – This ingredient is always found in pre workouts, because it is incredibly effective as a vasodilator. It widens the veins allowing more blood to pump through them, this can lead to an insane pump.

Niacin can also cause the famous “niacin flush” which is a harmless side effect where your face flushes and you may feel a slight tingling sensation in your skin.

• Strength Matrix (4.5g) – This matrix is clearly filled with ingredients that are designed to increase your strength. There’s the ever-present Creatine, which can help increase power, strength, and hypertrophy [1].

There’s Beta Alanine which can increase muscular endurance [2] and reduce fatigue [3]. Then there’s Agmatine Sulfate and L-Citrulline Aspartate which combine together to increase blood flow, and reduce pain.

• Caffeine Matrix (419mg) – This matrix contains Caffeine Anhydrous, Infinenergy (Dicaffeine Malate), and Caffeine Citrate, but we’ll refer to them all as caffeine here. The dosage is very strong, and it is hard to say whether this is an impressively ballsy move, or if it is insanity!

Of course there are many benefits to high caffeine doses, increased power, cognition, endurance, reduced fatigue, increased fat burning, and a raised metabolism are some of them. But there are also a lot of downsides to regularly taking high doses of caffeine, bad sleep, increased tolerance to caffeine, and therefore a reversal in benefits.

Ultimately, how much you weigh, and you current tolerance to caffeine will determine whether this amount of caffeine is beneficial or a hindrance.

• Intensity Matrix (629mg) – This last matrix contains quite a few lesser-known ingredients, such as Choline, Hordenine, N-Methyl L-Tyramine HCI, GABA, Yohimbe, and Rauwolfia Vomitoria Root Extract. The Choline can help improve cognitive function, as will the Hordenine, GABA relaxes you and can improve sleep (which seems an odd supplement choice for a pre workout).

Yohimbine will help you to burn some more fat, but is likely to be drowned out by the caffeine anyway. In fact this whole matrix would be made pointless by the ridiculously high caffeine content. It’s like lighting a candle on the surface of the sun to help you read a book!

Final Thoughts

ProSupps’ Mr Hyde is a decent pre workout, but it may suffer from having too much of a good thing. It’s not subtle in the slightest, and if you are looking for the most intense workout of your life, then this is the supplement for you. But you will also run the risk of having your workout overshadowed by the negative effects of too much caffeine.

Also, you will build a tolerance to this level of caffeine very fast, which will be problematic in the future (though not impossible to overcome).

All in all, an okay pre workout that may be perfect as an emergency “I only slept for 3 hours” workout.

Related: Pre Workout Supplement Guide | The Top Ingredients To Use


[1] Cribb, P., Williams, A., Stathis, C., Carey, M., Hayes, A. 2007. Effects of Whey Isolate, Creatine, and Resistance Training on Muscle Hypertrophy. Medicine & Science in Sports & Exercise39(2): 298-307(link)

[2] Kern, B., Robinson, T. 2011. Effects of β-alanine supplementation on performance and body composition in collegiate wrestlers and football players. Journal of Strength & Conditioning Research 25(7): 1804-15(link)

[3] Sale, C., Saunders, B., Hudson, S., Wise, J., Harris, R., Sunderland, C. 2011. Effect of β-alanine plus sodium bicarbonate on high-intensity cycling capacity. Medicine & Science in Sports & Exercise 43(10): 1972-8(link)


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