Crack Undead Review: This Pre-Workout Is Too Strong?

by Nader Qudimat
Updated June 6, 2023
Pre Workout
Serving Size
Hard to find
Potent stimulant mix
Multiple forms of caffeine and exotic stims
Very strong effects
Too strong for beginners

Bottom Line

Dark Labs' Crack Undead is a pre-workout supplement that packs a powerful stimulant punch.

This pre-workout is not for the faint-hearted, with its potent stimulant profile making it one of the strongest on the market.

Dark Labs, known for their hardcore supplement line, has outdone themselves with Crack Undead.

While I find Crack Undead to be more potent than its counterparts, it doesn't necessarily translate to being superior.

If you're lucky enough to find it in stock, use the discount code FITFREK.

However, it's often sold out and has been superseded by Crack Barbarian, which you can find here.


Crack Undead by Dark Labs was like a comet in the pre-workout universe - it blazed bright, but its presence was fleeting.

It hit the market for a brief period before it seemingly made way for its successor, Crack Barbarian.

But let's be real here, Crack Undead was a powerhouse.

The stimulant rush was intense, and the heart rate acceleration was nothing short of a sprint.

In contrast, Crack Barbarian, which we've also reviewed, seemed to hit that sweet spot of effects.

Perhaps Crack Undead's was due to its high-quality source of stimulants.

But Dark Labs is no stranger to pushing boundaries.

While the Crack series has traditionally been all about that DMAA life, it's refreshing to see them branching out with different stimulants and labels, even under the familiar Crack branding.

In the sections below, we'll dig into my personal experience with Crack Undead, breakdown its ingredients, and see how it stacks up against other Dark Labs pre-workouts.

Ready to dive in? Let's get started...

My Experience

Think you've braved the storm of the most potent pre-workouts? Well, brace yourself for Crack Undead.

This pre-workout is not just a ride, it's a rollercoaster.

Crack Undead boasts both DMHA and DMBA, stimulants I'm no stranger to. I've got them stockpiled, so I'm well-versed in their effects.

But let me tell you, the stimulant punch packed by Crack Undead is on another level, even though it's the same stuff I've been using.

I've had my rounds with Crack Gold, but... this is a whole new ball game.

Within a mere 10 minutes of downing Crack Undead, I can feel the familiar surge of energy coursing through me.

But as the 30-minute mark approaches, the sense of urgency starts to build, and beyond that, it's almost like a tidal wave.

It doesn't halt my workout, but it sure makes me work double-time to regulate my heart rate, especially after those hefty compound lifts.

The focus and energy are off the charts, but it feels like it's a marathon for the heart, and I'm sprinting just to keep up with the recovery.

This is one for the fitness veterans, and even then, it's not to be taken lightly.

I give it a thumbs up, but with a word of caution: consider starting with half a scoop. Trust me, the full scoop experience is like a wild horse race for the heart.

Crack Undead Ingredients

While Dark Labs is known for creating hardcore pre-workouts, Crack Undead is clearly one of the stronger ones we've used from them.

In fact, we find it too strong and it can get uncomfortable if the workout intensity is high enough.

So for this, we recommend being careful with this one.

Citrulline (6g):

This amino acid is naturally produced in your body and found in foods like watermelon. It's known to improve blood flow, which can enhance athletic performance. 

Beta-Alanine (3.2g):

Beta-Alanine is a non-essential amino acid that your body uses to produce carnosine, a substance that helps improve muscle endurance in high-intensity exercise.

Agmatine Sulfate (1g):

Agmatine plays a role in influencing receptors associated with pain perception. While it has weak general analgesic properties, it does show dose-dependent pain-relieving effects in treating neuropathic pain. 

Alpha GPC (500mg):

Alpha GPC is used to improve memory, learning, and thinking skills by increasing acetylcholine in the brain, a chemical that plays a crucial role in memory and learning functions. 

N-Acetyl L-Tyrosine (500mg):

Tyrosine is a supplement that may help improve alertness, attention, and focus. 

Black Pepper Extract (10mg):

Piperine, the active compound in black pepper, has been shown to improve brain function in animal studies. It has demonstrated potential benefits for symptoms related to degenerative brain conditions. 

Beta Phenylethylamine (750mg):

This compound is a trace amine and influencer of many neurotransmitters, including dopamine, serotonin, and norepinephrine. It's often used in pre-workout supplements due to its mood-enhancing and cognitive benefits, potentially improving focus and mood during workouts.

Eria Jarensis Extract (500mg):

This extract is a source of phenylethylamine compounds. It can increase levels of various neurotransmitters (dopamine and noradrenaline) in the brain, which can provide a mood boost and increase focus, energy, and motivation.

DMHA (350mg):

Also known as Octodrine, DMHA is a stimulant that boosts energy levels and focus. It's often used as a replacement for DMAA in pre-workout supplements.

Caffeine Anhydrous (300mg):

This is a dehydrated form of caffeine, acting as a central nervous system stimulant. It's commonly used to increase energy and improve focus during workouts.

Caffeine Citrate (225mg):

This is another form of caffeine that is absorbed faster than caffeine anhydrous, providing a quicker onset of effects.

Halostachine (150mg):

Halostachine is a stimulant that is structurally similar to ephedrine and pseudoephedrine. It's believed to have fat-burning properties and can provide an energy boost.

2-amino-4-methylpentane HCl (150mg):

This compound is a powerful central nervous system stimulant that can enhance energy levels, mental focus, and metabolic rate.

Hordenine (50mg):

Hordenine is a natural compound often used in weight loss supplements for its potential to stimulate metabolic rate and promote fat loss.

Naringin (25mg):

Naringin is a flavonoid compound found in grapefruits and other citrus fruits. It has antioxidant and anti-inflammatory properties. It's also been shown to enhance the effects of other supplements, particularly stimulants like caffeine.

Alpha Yohimbine (1.75mg):

This is a form of yohimbine, which is often used for fat loss. It can also increase energy levels and potentially enhance athletic performance.

Dark Labs Crack Undead King by Dark Labs

Crack Undead is a U.S. special release pre-workout made for high-energy and high-urgency workouts.

  • Strong urgency
  • DMBA and DMHA type of pre-workout
  • High physical energy and strong focus
Ingredients: 6g citrulline, 3.2g beta alanine, 1g agmatine sulfate, 500mg alpha gpc, 500mg n-acetyl l-tyrosine, 10mg black pepper etract
Stimulants: 750mg beta phenylethylamine, 500mg eria jarensis extract, 350mg dmha, 300mg caffeine anhydrous, 225mg caffeine citrate, 150mg halostachine, 150mg 2-amino-4-methylpentane HCl, 50mg hordenine, 25mg naringin, 1.75mg alpha yohimbine
FitFrek earns a commission if you click this link and make a purchase, at no additional cost to you.

Comparing Crack Undead vs Other Dark Labs Pre Workouts

Crack Undead vs Crack Barbarian


  • Both contain Beta Phenylethylamine and Eria Jarensis Extract.
  • Both contain Caffeine Anhydrous and Caffeine Citrate.
  • Both contain Halostachine and Alpha Yohimbine.


  • Crack Undead contains more DMHA (350mg) than Crack Barbarian (250mg).
  • Crack Undead contains 2-amino-4-methylpentane HCl, which Crack Barbarian does not.
  • Crack Barbarian contains less 2-amino-4-methylpentane HCl (100mg) than Crack Undead (150mg).

Crack Undead vs Herolean


  • Both contain Eria Jarensis and Caffeine.
  • Both contain Hordenine and Alpha Yohimbine.


  • Crack Undead contains more DMHA (350mg) compared to Herolean (200mg).
  • Crack Undead contains Beta Phenylethylamine and 2-amino-4-methylpentane HCl, which Herolean does not.
  • Herolean contains DMAA and Yohimbine HCl, which Crack Undead does not.

Crack Undead vs Crack Primal


  • Both contain Beta Phenylethylamine, Eria Jarensis, and Caffeine.
  • Both contain DMHA, Caffeine Citrate, and Alpha Yohimbine.
  • Both contain Halostachine


  • Crack Undead contains more DMHA (350mg) compared to Crack Primal (250mg).
  • Crack Undead contains 2-amino-4-methylpentane HCl, which Crack Primal does not.
  • Crack Primal contains Di-Caffeine Malate, which Crack Undead does not.


What is Crack Undead King by Dark Labs?

Crack Undead King is a potent pre-workout supplement from Dark Labs. It's known for its high-stimulant formula, designed to provide an intense energy boost for your workouts.

How strong is Crack Undead King?

Crack Undead King is considered one of the strongest pre-workouts on the market due to its potent blend of stimulants. However, its strength may not be suitable for everyone, particularly those new to pre-workouts or with a low tolerance to stimulants.

What are the main ingredients in Crack Undead King?

Crack Undead King features a comprehensive list of ingredients, including DMHA, caffeine anhydrous, caffeine citrate, Beta Phenylethylamine, and Halostachine, among others. Each ingredient serves a specific purpose, from enhancing performance to improving focus.

How does Crack Undead King compare to other Dark Labs pre-workouts?

Crack Undead King is considered more potent than other Crack pre-workouts. However, its high stimulant content doesn't necessarily make it better. It's all about personal preference and tolerance to stimulants.

Is Crack Undead King suitable for beginners?

Given its high stimulant content and potent formula, Crack Undead King may not be suitable for those new to pre-workouts or those with a low tolerance to stimulants.

What are the potential side effects of Crack Undead King?

Some potential side effects of Crack Undead King, particularly due to its high stimulant content, include jitters, anxiety, and difficulty sleeping. It's always recommended to start with a lower dose to assess tolerance.

Where can I buy Crack Undead King?

Crack Undead King can be hard to find as it's often sold out due to high demand. However, it's occasionally available on the Dark Labs website and other online supplement retailers.

What is the recommended dosage for Crack Undead King?

It's recommended to start with half a scoop to assess tolerance. Experienced users may progress to a full serving. However, it's always best to follow the manufacturer's instructions and consult with a healthcare provider before starting any new supplement regimen.

Does Crack Undead King taste good?

Taste is subjective, and some users have reported that the taste of Crack Undead King is not particularly pleasant. However, the effectiveness of a pre-workout is generally considered more important than its taste.

Is Crack Undead King worth the price?

While Crack Undead King is on the higher end of the price spectrum for pre-workouts, many users find its potent formula and comprehensive ingredient profile to be worth the cost. However, value for money will depend on individual preferences and workout needs.

What makes Crack Undead King different from other pre-workouts?

Crack Undead King stands out due to its potent blend of ingredients. It's designed to provide a significant boost in energy, focus, and endurance, helping you get the most out of your workouts.

Is Crack Undead King safe to use?

Yes, Crack Undead King is safe to use for most healthy adults. However, due to its potency, it's recommended to start with a smaller dose to assess your tolerance. Always consult with a healthcare professional before starting any new supplement regimen.

Can I use Crack Undead King every day?

It's recommended to use Crack Undead King sparingly, saving it for your hardest workouts. This is due to its high potency and the potential for side effects such as jitters and sleep disturbances.

How much caffeine does Crack Undead King contain?

Crack Undead King contains a blend of caffeine anhydrous and caffeine citrate, providing a total of 525 milligrams of caffeine per serving.

Where can I buy Crack Undead King?

Crack Undead King is available for purchase from various online retailers, including the Dark Labs official website.

Bottom Line

Crack Undead King by Dark Labs is a pre-workout supplement that's not for the faint of heart, literally.

It's packed with potent stimulants, including DMHA, caffeine anhydrous, and caffeine citrate, designed to give you an intense energy boost.

It also features a comprehensive ingredient profile, with each component serving a specific purpose, from enhancing endurance to improving focus.

Dark Labs keeping up with transparency in labeling is always appreciated.

And while it's a high-stimulant pre-workout, which may not be everyone's cup of tea, or pre-workout, many users have reported positive experiences with increased energy, focus, and endurance during workouts.

However, it's important to note that Crack Undead King is a strong pre-workout supplement.

If you're new to pre-workouts or have a low tolerance to stimulants, this might not be the best choice for you.

Also, availability can be a challenge as it's often sold out due to high demand.

In summary, if you're after a pre-workout that packs a punch and you're not sensitive to stimulants, Crack Undead King could be worth a try.

But as always, it's essential to listen to your body and consult with a healthcare provider before starting any new supplement regimen.

by Nader Qudimat

Forged by iron and cold steel, I'm Nader, a mid-30s natural bodybuilder. Once a 100lb skinny guy, I've transformed into a 200lb muscular athlete with over 15 years of lifting experience. Today, I leverage my transformation and extensive experience to guide countless individuals on their fitness journeys.

Click here to check out my 12 year transformation: Natural 12 Year Transformation

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