USN Pre Workout B4 Bomb Review

USN Pre Workout B4 Bomb Review Summary;


You will find a fairly basic ingredients profile within this, with 2 additional products that don't have a ton of research to back up the claims. 


Most of the ingredients are under dosed (or pointless). 


It's cheap, I can't deny it. As low as £0.8 per serving, but as high as £1.50. You can find other products at the same price range.


It does taste nice, but the overall effects vanish after 10 - 15minutes. And doesn't really seem to keep you going for as long as others. 


  • It can be as cheap as £0.8 per serving. 
  • Tastes Quite Nice
  • It has got some useful ingredients (though not fully dosed)


  • Nothing In Here Shouts 'Next Generation' or 'Explosive/Ultra Powered'. 
  • Pretty Standard/Low Ingredients Dosage 

A cheap, pretty standard pre workout, doesn't really hit the marketing hype that they use. Tastes nice. 

If you walk up to a random person in a gym, and ask them to name a few supplement brands, USN is probably going to be one of the few they may mention. 

They have been around for years, and will appear on most supplement websites, in some form or another. Today we are going to look into the USN B4 Bomb Pre workout, again a staple of the supplement world. 

Sold as an 'extreme pre workout', for maximum potency, without the sugar. It's time to see if this B4 Bomb pre workout, lives up to the reputation or the brand. Time to crack on with this USN B4 Bomb Pre Workout Review. 

Ingredients - What's Inside?

The first place to start with any pre workout, is understanding what it's made up of. A decent profile usually indicates if it's worth purchasing or not. USN bill themselves as being ahead of the research game and offering high quality products. 


Per Serving (15g)

L-Citrulline Malate

6,000 mg

Creatine Monohydrate

3,400 mg


2,000 mg


200 mg


150 mg


100 mg

Rhodiola Rasea Extract

100 mg


54 mg

Straight off the bat, nothing is really jumping out here as amazing or different. Though Bacowize and Zynamite stand out, and not something I have come across while reviewing pre workouts before. Though they may just be brand names for other ingredients or extracts. 

Citrulline Malate

Usually used to help with blood flow and elevating your nitric oxide levels. Pretty standard when it comes to pre workouts with high amounts of caffeine or any ingredients that restrict blood flow. Rough dosage is around 6,000, so hey they got something right. 

Hundreds of websites and YouTube channels with fight over L-Citrulline and Citrulline Malate, declaring one is better than the other. I am not the guy for that. 


Creatine can increase performance, but only after your body has built up a reserve of this stuff. Which takes time. 5grams is the recommended dosage, everyday.

Which is why I usually see it as pointless to have in a pre workout, because you shouldn't be smashing your favourite preworkout, everyday. 

Personally, I just see it as cheap filler that supplement companies add to their products to make it sound good. 

Beta Alanine

The marmite of pre workout lovers. Depending on the reaction you have when you take it. 

Beta Alanine has been linked to removing lactic acid, as well as extending how long it takes for you to become exhausted.  

Studies have shown that 3,200+ mg is the clinical dose. You would have to be doing 1.5scoops to get close to that minimum dosage. 


Nothing suspiring here, though they do call it 'natural caffeine'. I.e they extracted it from coffee beans. Coming in at 200mg, it's enough to give you the buzz you are looking for, without making your heart jumping out of your chest. 

Would I say that it puts it into the 'extreme pre workout' category, when this is the main proven stimulant? Probably not. Considering a lot of other pre workouts have better stimulants, or a higher dosage of caffeine. 


As I assume, Bacowize is a standardised version or Bacopa Monniera. Also known as Water Hyssop, this is a herb found in India, Nepal, China among other places. 

Supposedly it has a reputation for helping with anxiety and increasing concentration and focus. USN have looked to have included it for it's nootropic potential. 


Another propriety blend or patented ingredient, Zynamite is a standardised extract of Mangifera Indica. As with the Bacowize, this ingredient is a leaf extract, again supposedly good for power, energy, reduced pain and reduced muscle damage. 

It's also anti-doping. Whatever that's meant to mean. 

I couldn't find a lot about either of these two ingredients, other than the companies own fact sheet and some marketing jargon. 


An ingredient we have come across in the past, and of course, another plant extract. This time more focused on fatigue and potentially help with anxiety. 

Sadly, it's one of those ingredients that doesn't have a ton of research. A lot of the 'research' is simply observation or word of mouth from traditional medicine camps. 

Some have suggested that 100 - 600mg for up to 12 weeks seems to be fine, but could have issues in the long term (dry mouth, dizziness etc). Which may suggest constantly running this pre workout isn't the best idea. 

Ingredients Verdict

Some pretty basic, standard ingredients. Nothing really jumps out, apart from the 2 patented/blend products, though they don't have a lot of decent research showing if they are that useful. 

Pricing (Plus Price Per Serving)

Each serving is 15grams, though they do say you can potentially have 2 servings (4 scoops). Though I wouldn't recommend such a large dose of Beta Alanine or Citrulline. 

A tub comes in 2 sizes, 180 grams, or 300grams. Which means you get either 12 or 20 servings per tub. 

We only care about price per serving, as tubs come in so many damn sizes. I have found it for about £18 for the 180gram version, or £1.50 per serving. 

Oddly,  the 300gram one is around £16. Which tips this under the £1 point per serving at just £0.80p. Which does mean it's cheap.

Pricing Verdict

As cheap as £0.80p per serving. Can't really argue with that. 

How Does It Taste And Feel?

Once again I picked up the Cherry version, as it seems to be the flavour that everyone is throwing around at the moment. Pretty damn tasty to be fair. They also have Blue Raspberry and Orange available for those who don't enjoy fake cherry. 

But, who cares how it tastes, we care about how it hits you. 

It doesn't really. If I am honest. You can feel it kicking you, especially if Beta Alanine is your nemesis. But after around 10 minutes, you feel nothing, the kick has gone and you are done. 

Taste Verdict


Final Verdict

Considering it's marketed, as a ultra potent pre workout formulation, it's pretty meh. It tastes alright, but that's about it. If you are after a cheap pre workout and you need it delivered to your gym yesterday... then yeah sure, grab some as a backup. 

If you want a decent, balanced, useful pre workout, I would look elsewhere. 

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