Killer Labz Executioner Review


  • Contains Citrulline Malate
  • Caffeine is the best stimulant in a pre-workout
  • Taurine can reduce cramping


  • All ingredients are part of 2 proprietary blends – you don’t know the exact dosages of each ingredient.
  • Increased risk of side effects due to proprietary blends
  • Beta-Alanine causes paresthesia
  • DMHA banned in competitive sports
  • Raulwoscine known to cause side effects

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Killer Labz Executioner Review

About The Product 

Executioner is a pre-workout by Killer Labz. It costs $49.99 for 30 servings, and comes in 3 flavors – Wicked Watermelon, Blood Orange, Sour Gummy Worm.

Who are Killer Labs? 

Killer Labs are a supplements company based in the USA. They specialize in pre-workout supplements, but also market BCAAs and Testosterone Boosters.

However, there wasn’t much more information about them on their website.

Executioner Ingredients Explained

Killer Labz specialize in pre-workout supplements, so you’d think this product would be perfect.

However, straight after looking at it’s ingredient list, we can see a problem – it contains a proprietary blend.

Why Proprietary Blends Are Bad 

Proprietary Blends are mixtures of numerous ingredients in one blend. This is a problem, as you don’t know the exact dosages of each ingredient inside – and some can cause side effects in high dosages (such as Caffeine in dosages over 200mg).

But that’s not all. Proprietary blends are bad, because they’re one of the biggest gimmicks in the supplements industry designed to make money while cutting costs.

How? Well, Companies can fill most of these blends with cheaper, ineffective ingredients, and add minimal amounts of effective ingredients – to save themselves money.

Anyway, we’ll take you through the most important ingredients in Killer Labz Executioner.

Killer Labs Executioner ingredient list review

Here’s Everything You Need To Know:

Killer Pumps 

This is the first proprietary blend inside Killer Labz’ Executioner. So just be aware that no-one knows the exact dosages of each ingredient in here.

Citrulline Malate 

This is one of our favorite pre-workout ingredients when dosed optimally at 6,000mg. However, as it’s part of a proprietary blend, no-one knows how much is in Killer Labz Executioner.

But one thing’s for sure – this whole ‘Killer Pumps’ blend is 6,000mg, so it’s impossible for there to be an optimal amount in here.


We have very mixed opinions about Beta-Alanine. It can improve muscular endurance, but also causes paresthesia (a tingling on the skin of your face and body).

Agmatine Sulfate & Creatinol-O-Phosphate

These two ingredients aren’t proven to work in any studies – making them unreliable.


Insane Energy

This is the second proprietary blend inside Killer Labz Execuitioner. So we don’t know the exact dosage of ingredients in here either.


This has shown to improve your focus, but doesn’t offer any other benefit to improve your workout.

Basically, caffeine dosed correctly provides this benefit, so there shouldn’t be any need to L-Tyrosine in Killer Labz Executioner.


This is the best stimulant in a pre-workout when dosed correctly below 200mg per serving. The problem is, no-one knows the exact dosage as it’s part of a proprietary blend.

Caffeine can cause jitters and energy crashes when dosed highly (above 200mg), so you’re at risk of suffering from side effects here. We recommend that you only consume between 150-200mg Caffeine per serving in a pre-workout.


Also known as DMHA, this is banned in competitive sports – so athletes should avoid this ingredient like the plague.

Hordenine & Phenylethylamine

These 2 ingredients haven’t shown to work in any study – making them unreliable.


This hasn’t shown to be effective in any study, but has been reported to cause anxiety. It’s similar in structure to Yohimbine, which has been banned in numerous countries for causing harmful side effects – so we recommend avoiding Rauwolscine.

Killer Labz Executioner Pre-Workout Review

See Your Best Options In Our
Top 3 Pre-Workouts Page

Side Effects

As Killer Labz Executioner contains 2 big proprietary blends, there’s an increased risk of you suffering from side effects.

Caffeine can cause jitters or energy crashes when dosed above 200mg per serving – and no-one knows how large the dosage is in this pre-workout (as it’s part of a proprietary blend).

Not only that, Beta-Alanine can cause paresthesia, which is a tingling on the skin of your face, chest, hands, fingertips and toes. Rauwolscine can also cause anxiety, which isn’t good.

Here’s the potential side effects from taking Executioner: 

  • Jitters (High dosage of Caffeine above 200mg per serving & Rauwolscine)
  • Energy Crashes (High dosage of Caffeine above 200mg per serving)
  • Paresthesia – tingling on the skin of your face and body (Beta-Alanine)
  • Banned from competitive sports (DMHA)
  • Anxiety (Rauwolscine)

Killer Labz Executioner Review Conclusion

We never recommend any products that contain proprietary blends – you can’t be sure whether these supplements are going to work, as you don’t know the exact dosages of each ingredient inside.

Not only that, Killer Labz Executioner contains some ingredients that can cause side effects (as you can see from the side effects section).

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