Grenade 50 Calibre Pre-Workout Review | DO NOT BUY!

Grenade 50 Calibre Pre-workout Review

Reviewed by:
On 2013-12-08
Last modified:2019-10-20


A pre-workout supplement that falls down in every category except the one that doesn’t really matter, presentation. I’d recommend you steer clear of Grenade 50 Calibre and opt for something with better flavour and more power.

Looking at some of our recent reviews, you could be forgiven for thinking that we’re on the payroll of The Protein Works and Go Nutrition.

Well I don’t have the security clearance to access that information.

We had to beef up security after we found out the NSA were not only spying on Angela Merkel but they were breaking into Gymtalk Towers in an attempt to learn our muscle building secrets.

Presumably to use on their super soldier program.

Anyway, where was I?

Right, corporate money can’t buy everything, and it certainly can’t buy stars for our review system, as shown by the pre-workout supplement Grenade 50 Calibre.

Let me take you on a journey through hell…

Product overview

Grenade 50 Calibre Preworkout Review
Grenade are a British company that are probably best known for peddling the UK’s topselling fat burning supplement, Grenade Thermo Detonator.

Certainly as a brand they have a very impressive image.

Even from the name you suspect you might be getting a product with a lot of bang for your buck.

They certainly play up to it very well it has to be said.

Their fat burner comes in a grenade shaped pack and this pre-workout comes in an ammo crate style box.

Very cool, however the fact that it makes you feel like an army man is probably the best thing about this product.

Taste and texture

Let’s start with taste.

I opted for the ‘Berry Blast’ of Grenade 50 Calibre as I figured this would somehow add a little extra to a supposedly powerful pre-workout.

It tasted very similar to the bottles of £2.99 red wine I used to drink back in my student days.

Every sip burned the back of my throat like battery acid.

However, while it was burning my tonsils off it also managed to taste sweeter than a builder’s cup of tea.

I couldn’t finish a full serving of Grenade 50 Calibre for fear of burning through my stomach lining in the middle of a set of squats.


There was a lot of it, in the worst way possible.

It was so awful that I had to take a picture which, as they say, tells 1,000 words.

Grenade 50 CalibreThis was taken after 15 minutes of vigorous shaking and in an effort to see the silver lining.

At least my right arm got a fairly decent workout!

This graininess couldn’t be missed either.

It wasn’t like a bit of powder that wouldn’t dissolve, it felt as if pebbles had been slipped into the mix and at one point I actually had to chew some of these down in an effort to dissolve them even more.



Again, Grenade 50 Calibre failed to cash the cheque its packaging was writing.

I’ll start with how it made me feel.

Rather than getting a boost in energy levels and the classic beta alanine tingles I felt light headed to the point of feeling a little sick and began sweating heavily.

Looking at the ingredients list there is no logical reasoning for these side effects but this is what happened.

On more than one occasion I might add.

I needed the boost after a long day at work and with a high volume leg session fast approaching the last thing I needed was to lose my sense of balance when heavy squats were the order of the day.

Needless to say I felt incredibly short changed.

In one of my previous articles, I went into under-dosing in the supplement industry and this product is guilty of this on multiple fronts.


Per serving only 1.5g of creatine monohydrate is on offer.

5g pre and post is the standard recommendation going around at the moment.

Now it could be argued that this allows people to take their own creatine however I’d argue that if you’re offering a pre-workout product it should offer everything you require pre-workout.

Citrulline malate

Again, 1.5g is on offer here and while this is within an effective dosing range, doses of around 3g have been shown to be more effective.

Beta alanine

1.5 g is on offer.

Now, while some people say that 6g of beta alanine should be consumed per day split into 1.5g doses this seems to have no greater benefit compared to 4g pre-workout.


The worst offence Grenade 50 Calibre commits, in my opinion, is the BCAA content provided.

10 grams pre workout is the standard but here 0.4 grams are contained per serving.

The same agreement for the creatine dosage could be offered up but I don’t think that really helps.

When they claim that “BCAAs are added for anti-catabolic support” they are really pushing their luck with anyone who can read and use Google.

Value for money

The box of 580g, which equates to 50 servings, comes in at about £38 depending on how well you shop around (Amazon is usually the cheapest option).

This works out to about 75 English pennies.

On the face of it, this is pretty good value, but when you compare it to Jack3D Micro or MusclePharm Assault it isn’t all that good, as both of those products come in at about 65p a serving.

A bit like buying Neurofen when Tesco own brand ibuprofen does the same thing for less.

I feel like you’re just paying for the cool box this product comes in.


This, then, is a product that falls down in every category except the one that doesn’t really matter, presentation.

On this writer’s recommendation I’d recommend you steer clear of this product and opt for something with better flavour and more power.

It’s a classic case of reading the label with this one I’m afraid.

Bit of a downer this one readers.

Hopefully next time we’ll have another five star review for you all full of hyperbole and knob gags as usual.

Until next time, go lift some iron or something.

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  1. Classic Neg, watch the affiliate sales flying in!

  2. Are you sure you weren’t sick when you took this?

    In my opinion it’s the best pre-workout ever.

    1. I think it’s one of the best… matter of fact it’s the best!

  3. Thank you very much for this review.

  4. I would say you were mixing wrong dosagae or you have taken another product along side it.

    Because this is the best pre-workout I have taken, wouldn’t even consider a different one.

  5. You are sick!!!!!

    This is the most amazing pre-workout ever!!! Y

    ou maybe drink toooo much alcohol! Lol

  6. Great pre-workout!

    Crazy energy boost!!!!!

  7. Yea to me it’s one of the best .

    Just tried it awhile ago and it have me energy I never had before!

    Maybe you took the wrong dosage with the wrong amount of added water.

  8. This author has to be paid by other products’ promoters.

    If not, he must have been taking and mixing some other stuff.

    The reason I say this is that this product is definitely 100% one of the best ever that I have ever used.

    It really works.

    If you don’t believe me try it yourself and you decide.

    You will be suprised on how good it works!

  9. I somewhat agree with the lightheaded/dizzy feeling, it gave me the energy to do 15 sets of deadlifts, but between sets I felt lightheaded and had to sit down.

    I put it down initially to being unfit but now I’m not so sure.

    It does give you a ton of energy though, I’ll try something more refined in the future.


  10. This sounds wrong, most amazing pre-work out supplement I have ever tried, and I use it religiously!

  11. Just took this for the first time prior to an 8 mile run…

    This review seems to be for a completely different product.

    Tastes OK but not nasty and definitely no sickness.

    Felt like I could have done another 4 miles when I was done.

    I’ve been running for years and tried many different products, this definitely gives results in my opinion.

    Also took 4 mins off my usual time.

    1. Blood N2O boosting/stimulant products aren’t ‘exercise appropriate’ for endurance training, mainly because of the effect they have on heart rate, and also vascular dilation which can result in blood pressure dropping significantly during steady-state exercise.

      They’re designed for explosive lifting efforts and vascular ‘pump’.

      A number of deaths have been attributed to stimulant products in endurance events.

      Be careful!

  12. Your shaker shows 200ml water lol.

    The shake looks light coloured to start with, I put 300ml water with 1 and half scoops and have never felt any other buzz in my life than I do taking this.

    Also, two to two and and a half hour gym sessions.

    You’re taking it wrong, so sit down lol.

  13. This review is spot on.

    Nearly felt everything the reviewer told, including feeling light headed and sick.

    Wish I knew the website before.

  14. I’ve been using Grenade for quite some time now and I’ve got to say that you must’ve done something wrong!

    The only negative thing about Grenade is the crash afterwards every now and then…

    I am taking one scoop with about 300ml of water ~20 mins before starting my workout.

  15. Just want to know whether grenade causes premature ejaculation?

  16. I have been using NO Xplode.

    My friend gave me some servings of Grenade .50 Caliber in Lemon Raid flavor to try.

    Amazingly, it worked for me.

    It’s best product too!

    I give it 5/5 star!

  17. Worst pre-work out for me ever!!!

    Light headed, dizzy, sick, and completely drained after my workout!

    Will never use it again and will stick to my normal pre-workout

  18. Taste and texture!?

    Who cares!?

    It’s a pre-workout!!

    I couldn’t care if it tasted of manky arse as long as it did the job.

    However, killa cola tastes outstanding!

    As for effectiveness… I’ve tried them all and this is without a doubt the best!

    I even prefer it to ECA or DMAA.

    Initially, I was wary due to the marketing genius of this product but I absolutely love it!

  19. If I didn’t know better I would believe this guy and stay away from it.

    Either he is a competitor or wrote about the wrong product.

    A mate bought it and gave me a sachet to try with the instructions only take half and train 30 mins after.

    The effects were the best I have seen ever.

    I had endurance and though I won’t say it gave me strength, I was able to do far more sets and reps than I have done before and with little rest in between.

    In fact I didn’t need the rest.

    Don’t listen to this guy, try it yourself.

    I think it’s important to not just read every piece of crap out there and this guy is talking crap.

    I have since ordered a container load.

    By the way I bought it from Holland & Barrett.

    Make sure you buy the right stuff and take right quantity.

    I seriously suggest you take only half cause any more and you will have way too much energy.

    I am serious.

    1. Agree 100% Andrew, cracking pwo, great flavour and almost instant boost.

      Yeah sounds like a competing company he is writing for.

  20. I tried this out for the first time this Saturday gone.

    I must say it gave me a serious buzz!

    I have never worked out like I did, great energy booster.

  21. So to start with, this was my first pre.

    Bought sample package that has full scoop, tried full scoop for first pre, yes I felt dizzy and had upset stomach and lightheaded, and decided to stay away from PWOs.

    Then I did my research and found out that it was just because of low caffeine tolerance.

    Tried other PWOs: C4, JYM – Pre-Jym, few of ON PWOs… they mostly have lower caffeine than Grenade.

    Went back to Grenade, started with 1/4 of scoop, felt better pump, great focus, no crash.

    Now taking this PWO for like 6+ months, and only taking 1/4 and 1/3 of scoop, had no need to even increase to half a scoop, therefore there are many pros:

    >cost efficient, eventually 40 serving pack transforms to 90-120 servings for me

    The only neg reviews are mentioning that people felt sick, dizzy, lightheaded, upset stomach.

    This is because their caffeine tolerance is low, you should start with a small dose and see how it goes, and build it up eventually.

    Personally I take 1/3 or sometimes 1/4 scoop, every other workout e.g. 2 times a week or something.

    When I feel that I don’t get much from it, I pause it for a few weeks and then take PWO again.

    >never had need to increase dosage
    >lasts long time, saves money

    I pour about 200-250ml of water, put powder in, shake for about 10-15 sec, never had lumps, never sticked to the shaker (like protein that is hard to wash out).

    Overall it is good but taste-wise is like 6/10.

  22. Agree it’s one of the worst pre workouts I’ve tried.

    I’ve tried a lot and this falls short in everything.

    I had the cola one, smelled like a hospital room, tasted like flat 10 day old coke and it never mixed well so the drink was all gritty.

    Even after 1 hour at the gym, I can still taste the acidic taste in my throat, actually makes me feel sick and burp a lot during your sesh.

    So much better pre out there.

    Only people that would say this is good are people that haven’t tried No Xplode Forumla 1, Jack 3d before the ban and Nano Vapor.

  23. Can’t agree at all, found it to be very tasty (Berry Blast).

    True it is a strong flavour – a bit gritty no more than that.

    Almost instant energy boost and can’t complain one bit.

    Would highly recommend this product.

  24. I agree.

    I’ve only tried it once and it tasted like lemon flavoured sand.

    Such an average product.

  25. I agree it tastes rank and has a very low dose of vital ingredients.


    I guess all the comments below are from Grenade employees etc.

    People will try it and work it out for themselves at the end of the day lol.

  26. “Looking at some of our recent reviews, you could be forgiven for thinking that we’re on the payroll of The Protein Works and Go Nutrition.”

    Like you said… you are the soldier of others…

  27. Horrible – could not even finish my work out because I was too light-headed