PEScience - High Volume - 36 Servings

PEScience High Volume is the original stimulant-free pump pre-workout — caffeine-free, beta-alanine-free, and built entirely around nitric oxide and hydration ingredients that deliver real, noticeable pumps without the jitters, tingles, or crash. Six grams of pure L-Citrulline, 2,000mg of Arginine Nitrate (NO3-T), Agmatine Sulfate, HydroMax Glycerol, Taurine, and electrolytes in a fully transparent, clinically-dosed formula. Train any time of day, stack it under any caffeinated pre-workout, or run it solo. 18 two-scoop servings per container.†

Key Doses Per Full Serving (2 Scoops)

• L-Citrulline — 6,000mg
• Arginine Nitrate (NO3-T) — 2,000mg (delivering 530mg active nitrate)
• Agmatine Sulfate — 1,000mg
• Taurine, HydroMax Glycerol, Electrolytes (Sodium, Magnesium) — Performance Pump Matrix
• Vitamin C — 250mg
• Zero caffeine. Zero beta-alanine. Zero stimulants.
• 18 servings (2-scoop) per container
• California Prop 65 Warning applies — see label

What's Inside PEScience High Volume

• L-Citrulline — 6,000mg — pure L-citrulline, not citrulline malate. The distinction matters: citrulline malate at a 2:1 ratio contains only half the active citrulline by weight, meaning many competing products with "8g citrulline malate" are only delivering 4g of actual citrulline. High Volume's 6,000mg is pure citrulline with no filler. Citrulline bypasses liver metabolism that degrades up to 38% of standard arginine before it reaches the bloodstream, making it significantly more effective for raising arginine levels and driving nitric oxide production. At 6g, High Volume matches or exceeds the doses used in clinical trials showing improved muscle endurance, reduced fatigue, and faster post-exercise recovery.†
• Arginine Nitrate (NO3-T) — 2,000mg — a patented compound that provides arginine alongside nitrate in a single ingredient, activating two separate nitric oxide pathways simultaneously. Arginine directly generates nitric oxide via the NOS enzyme pathway. Nitrate provides a second, independent route — the nitrate-nitrite-NO pathway that functions separately from NOS and is particularly effective during intense exercise when oxygen availability is reduced. The 530mg of active nitrate per serving is a clinically meaningful dose. Research on dietary nitrates shows improved exercise capacity, extended time to exhaustion, and enhanced performance. Combining NO3-T with 6g citrulline creates a dual-pathway nitric oxide stack that produces more sustained vasodilation than either ingredient alone.†
• Agmatine Sulfate — 1,000mg — a metabolite of L-arginine that works defensively by inhibiting arginase, the enzyme that breaks down arginine in the bloodstream. By slowing arginase activity, agmatine extends the lifespan of the arginine generated by citrulline and NO3-T, keeping nitric oxide production elevated for longer. It also has independent nitric oxide synthase-stimulating properties. The combination of citrulline, NO3-T, and agmatine creates a three-mechanism pump stack — production, delivery, and preservation of nitric oxide.†
• HydroMax Glycerol — a high-yield glycerol form that draws water into muscle cells osmotically, increasing intramuscular volume and hydration. The result is a fuller, harder muscle appearance during training and improved endurance through better cellular fluid retention. HydroMax is the most stable, highest-concentration glycerol form available — it delivers significantly more active glycerol per gram than standard glycerol monostearate.†
• Taurine — functions as an osmolyte alongside glycerol to regulate cell volume and maintain muscle cell integrity under training stress. Supports calcium signaling for improved muscle contractions, acts as an antioxidant against exercise-induced oxidative stress, and has been shown to support endurance, strength, and muscle recovery in research using comparable doses. Also contributes to nitric oxide production through vascular function support.†
• Sodium and Magnesium (Electrolytes) — a targeted electrolyte matrix to maintain fluid balance, support muscle contractions, and prevent performance decline from training-induced electrolyte depletion. Proper hydration is a prerequisite for maximum pump — electrolytes ensure the hydration ingredients in High Volume can work at full capacity.†
• Vitamin C — 250mg — an antioxidant that counteracts free radicals generated during intense exercise, supporting recovery and immune function. Also plays a role in collagen synthesis for connective tissue integrity.†

Frequently Asked Questions About PEScience High Volume

1. Is High Volume completely caffeine-free and can I take it at night?
   Yes — High Volume contains zero caffeine, zero stimulants, and zero beta-alanine. It was specifically designed for athletes who train late, are sensitive to stimulants, or who prefer to get their caffeine from a separate source like coffee. The pump and performance you get from High Volume comes entirely from nitric oxide production and muscle hydration — not from CNS stimulation. This makes it genuinely appropriate for evening training without any sleep disruption concerns. PEScience has been making High Volume since 2012, and it remains one of the most respected stimulant-free pre-workouts in the category.†
2. How does High Volume compare to stim-based pre-workouts for pump?
   Most stimulant-based pre-workouts include pump ingredients as a secondary consideration — they're primarily energy and focus products with some citrulline thrown in. High Volume inverts that priority entirely. The entire formula is built around pump, hydration, and performance capacity, with the full clinical citrulline dose, dual-pathway nitric oxide from NO3-T, agmatine for nitric oxide preservation, and HydroMax glycerol for cellular hydration — all at full doses with no ingredients wasted on stimulant delivery. If you want maximum pump, High Volume will outperform any stimulant pre-workout's pump component because those products have to split their formula across stimulants, focus, and pump. High Volume puts everything into pump.†
3. Can I stack High Volume with a caffeinated pre-workout?
   Yes — stacking is one of the most popular ways to use High Volume. PEScience designed it specifically to pair with their caffeinated pre-workout Prolific: take one scoop of each for a combined formula that covers energy, focus, and maximum pump in a single serving. The same approach works with other caffeinated pre-workouts — one scoop of High Volume plus your usual pre-workout adds a significant pump layer to whatever formula you're already running. One important note: if your pre-workout or any other supplement contains additional nitrates, do not combine them with High Volume. The arginine nitrate in High Volume already provides meaningful nitrate content, and stacking additional nitrate sources requires physician supervision.†
4. How do I know what dose to take — one scoop or two?
   PEScience recommends using bodyweight as the guide. If you weigh 160 pounds or less, start with 1 scoop. If you weigh over 160 pounds, take 2 scoops. The one-scoop serving still delivers 3g citrulline, 1g arginine nitrate, and 500mg agmatine — a functional dose — but the two-scoop full serving is where the clinical-range doses kick in. Note that High Volume can clump slightly due to the HydroMax glycerol content — this is completely normal and does not affect performance. Use the product within three months of opening for best quality.†

How to Take PEScience High Volume

Mix 1-2 scoops in 8-12oz of cold water 30 minutes before training. Users 160 lbs or less: 1 scoop. Users over 160 lbs: 2 scoops. Do not exceed 2 scoops per serving. Do not combine with additional nitrate sources from medications or other dietary supplements. Do not use if taking erectile dysfunction medication. Discontinue use 2 weeks prior to surgery. Store in a cool, dry place and use within 3 months of opening. Minor clumping is normal.†

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Who Should Not Take PEScience High Volume

• Do not use if you are taking erectile dysfunction medication — the nitrate content in High Volume can interact dangerously with nitrate-based ED medications
• Do not take alongside additional nitrate sources from medications or other supplements without physician supervision
• Not for individuals with high or low blood pressure, cardiac arrhythmia, stroke history, or heart disease without physician clearance
• Not for use by individuals under 18, or pregnant or nursing women
• Discontinue use 2 weeks prior to surgery
• Consult a physician before use if taking any prescription or over-the-counter medication or if you have any pre-existing medical condition
• California Residents: This product can expose you to chemicals including Lead, known to the State of California to cause cancer and birth defects or other reproductive harm. Visit www.P65Warnings.ca.gov/food for more information.
• Keep out of reach of children

†These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.