Put pump ingredients first
A substantial 8g L-citrulline serving leads the formula.
Made for your routine
Lifters training later, limiting caffeine, or looking for a dedicated stimulant-free pre-workout.
Explore the formula ↗
What you can expect
A reason behind the formula.
Get a formula built around pump, focus, and electrolytes without using a caffeine hit to lead the experience.
Train on your schedule
No added caffeine makes it an option when another stimulant dose does not fit your day.
More than a pump-only powder
Glycine, Alpha GPC, taurine, and an electrolyte panel broaden the formula.
Inside the formula
The amounts matter.
Per 1 scoop (24g)
L-citrulline
Paired with 1g arginine HCl.
Glycerol monostearate
Ingredient weight; this is not 3g of pure glycerol.
Alpha GPC 50%
Provides approximately 600mg Alpha GPC based on the labeled concentration.
Taurine
Alongside 2g glycine.
Sodium
Plus potassium, calcium, and coconut water powder.
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.
Flood combines a pump-focused formula with focus ingredients and electrolytes. Choose it for the broader powder formula; Berserker Serum offers a liquid format centered on active glycerol and citrulline.
| Consideration | Your priority | What you get |
|---|---|---|
| Flood | Powder format | Pump + focus + electrolytes |
| Berserker Serum | Liquid format | Active glycerol + citrulline + focus ingredients |
| Your caffeine choice | No added caffeine in either | Compare all overlapping actives before stacking |
Your supply20 full-scoop workouts per tub
Choose your option ↗
Your routine
Make it part of the plan.
Use 1 scoop as the labeled serving, mixed in water before training. Follow the directions on your tub and review other products for overlapping ingredients.
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 just for evening workouts?
No. It can fit any workout where you want a pre-training formula without added caffeine.
Does stim-free mean I can stack anything with it?
No. Flood still contains active ingredients, including huperzia serrata. Review your full stack for duplication and suitability.
Does 3g glycerol monostearate mean 3g active glycerol?
No. Those are different measures. The label lists glycerol monostearate ingredient weight.
Before you use it
Consult a healthcare professional before use with medication or a medical condition. Review the label and avoid duplicating huperzine A across products.
Returns policy
STIM-FREE PUMP + FOCUS
Build your session around the pump.
20 full-scoop workouts per tub
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.
