Energy with a broader formula
High caffeine is one part of the serving, alongside carbs and pump ingredients.
Made for your routine
Experienced adult pre-workout users who want high caffeine plus a broader training formula in one drink.
Explore the formula ↗
What you can expect
A reason behind the formula.
Combine stimulant energy with carbohydrates, citrulline, betaine, and focus ingredients. Choose between the clearly labeled one- and two-scoop amounts.
Carbohydrates included
Two scoops supply 10g carbohydrates from the Cluster Dextrin® ingredient.
Know exactly which dose you chose
One scoop gives half the listed two-scoop amounts. The tub contains 40 single scoops.
Inside the formula
The amounts matter.
Ranges show 1 scoop (20.2g) to 2 scoops (40.4g)
L-citrulline
Plus 1–2g L-arginine base at 1–2 scoops.
Cluster Dextrin®
Highly branched cyclic dextrin carbohydrate.
Betaine anhydrous
1–2 scoops, respectively.
L-tyrosine
Alongside 1.6–3.2g beta-alanine.
Caffeine anhydrous
Plus 50–100mg Infinergy® ingredient weight at 1–2 scoops; the malate is not all caffeine.
View the full Supplement Facts
Amounts shown in the highlights use the serving basis above. The original label includes the complete panel, other ingredients, and allergen information.
Open the full-size label ↗
Why choose this formula?
Make your choice count.
Shadow prioritizes stimulant intensity and focus. Berserker Stim spreads the formula across energy, carbohydrates, pump, and focus ingredients. Choose the formula that matches the session rather than chasing the largest stimulant number.
| Consideration | Your priority | What you get |
|---|---|---|
| Shadow | Stimulant-heavy energy + focus | Start with ½ scoop |
| Berserker Stim | Broader training formula | Caffeine + carbs + pump + focus |
| Serving choice | 1 versus 2 scoops | All ingredient amounts double; so does stimulant intake |
Your supply40 one-scoop or 20 two-scoop workouts
Choose your option ↗Your routine
Make it part of the plan.
Use 1–2 scoops according to the label and your tolerance. Start with 1 scoop. Two scoops already contain 400mg caffeine anhydrous plus additional caffeine from Infinergy, exceeding the general 400mg daily reference for most healthy adults. Do not combine with other caffeine or stimulants.
The Hollow standard
Built for people who put in the work.
Before building Hollow Labs, Allen Collins owned supplement stores. The questions he heard from customers still shape the brand: what is in it, how much do I take, and why should I choose it?
Our standard is simple: make the formula easy to understand, explain where it fits, and stay reachable when you have questions.
Meet Hollow Labs ↗HOLLOW LABSSTANDARDS BEFORE SHORTCUTS.Ask our team ↗
Is it 40 full two-scoop servings?
No. The tub contains 40 single scoops, equal to 20 two-scoop servings.
Is 10g the combined citrulline and arginine amount?
No. Two scoops contain 10g L-citrulline plus a separate 2g L-arginine base.
Can I take two scoops with coffee?
Do not combine it with coffee, energy drinks, another stimulant pre-workout, or additional caffeine. Two scoops are already a very high-caffeine serving.
Before you use it
High-caffeine product for experienced adults only. Avoid if pregnant, nursing, stimulant-sensitive, or advised to limit stimulants. Consult a healthcare professional with medication use or any medical condition. Avoid close to bedtime.
Returns policy
HIGH-CAFFEINE TRAINING FORMULA
Build the whole session into your scoop.
40 one-scoop or 20 two-scoop workouts
Choose your option ↗Free shipping on orders $75+ after discounts*
*Final eligibility is confirmed at checkout.
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.
FREE SHIPPING ON ALL ORDERS OVER $75
FROM THE JOURNAL
Know what goes in your routine.
Understand the ingredients, read the label, and choose what fits your training.
