PEScience High Volume Stim-Free Pre Workout Pump Powder - Intense

In this review of PEScience High Volume, the focus is simple: anyone who wants powerful gym pumps and improved endurance without caffeine will find a reliable option here. The formula is explicitly stimulant-free and targets nitric oxide support with ingredients that promote blood flow, hydration, and nutrient delivery during training. For athletes who train late, prefer to avoid jitters, or want a pump-focused pre-workout to stack with stimulant products, High Volume presents a clear, evidence-based choice.

Key Features

• Stim-free formula: Provides workout support and pump effects without caffeine so it can be used any time of day or stacked with stimulant products as desired.
• 6 g L-citrulline: Uses pure L-citrulline to reliably increase nitric oxide precursors and support larger, longer-lasting muscle pumps.
• 2 g arginine nitrate (NO3-T): Supplies nitrate-based arginine to complement citrulline and enhance blood flow and nutrient delivery to working muscles.
• Hydration blend: Includes HydroMax glycerol, sodium, magnesium, and taurine to support cell hydration and endurance during intense sets.
• Tingle-free experience: Formulated without beta-alanine or niacin to avoid the common tingling and flushing effects of other pre-workouts.
• Third-party tested: Each batch is third-party tested and gluten-free, reflecting consistent manufacturing and transparency.

Who It's For

PEScience High Volume is best for lifters and athletes who prioritize pump and blood-flow enhancement over stimulant-driven energy. It suits anyone training late in the day, those sensitive to caffeine, or individuals who want a non-stim pre-workout to pair with stimulants, BCAAs, or creatine for a customized stack.

People seeking a pre-workout specifically for rapid focus and caffeine-driven alertness should look elsewhere, since High Volume intentionally omits stimulants. Also, if you want ingredients like beta-alanine for sensory stimulation, this product will not provide that effect.

Pros & Cons

Pros

• Clean, stimulant-free formula that still delivers strong pumps and improved endurance.
• High doses of pure L-citrulline and arginine nitrate for effective nitric oxide support.
• Hydration ingredients and glycerol help sustain performance and reduce muscle fatigue.
• Taste and mixability are generally praised, making it easy to drink any time of day.

Cons

• Some users find the flavor too sweet, so taste preference may vary.
• Does not provide stimulant-driven energy, so not ideal as a one-stop energizer for morning users seeking caffeine.

Specifications

Product type	Stimulant-free pre-workout powder
Serving size	36 scoops per container (dosage 1-2 scoops)
Key actives	6 g L-citrulline, 2 g arginine nitrate (NO3-T), HydroMax glycerol
Additional support	Sodium, magnesium, taurine for hydration and endurance
Flavor	Acai Berry Punch (other award-winning flavors available)
Testing	Third-party tested, gluten-free

Our Verdict

PEScience High Volume is a well-formulated, stimulant-free pre-workout that delivers the core benefits athletes want: pronounced pumps, improved blood flow, and better hydration during training. It represents good value for those who prioritize nitric oxide support or need a late-night or stackable non-stim option, though flavor preferences will vary among users.

Frequently Asked Questions

Can I use this product if I avoid caffeine?
Yes, High Volume is caffeine-free and intended for users who avoid stimulants or who want a non-stim pre-workout for evening sessions.

How many scoops should I take?
Recommended dosing is 1 scoop for people 160 lbs or less and 2 scoops for those over 160 lbs; it is also designed to be stackable with stimulant pre-workouts if more energy is desired.

Will I feel tingling or flushing?
No, the formula omits beta-alanine and niacin, so it avoids the tingling and flushing common to many other pre-workouts.