PEScience High Volume is a caffeine-free pump pre-workout that runs a dual nitric oxide approach — combining citrulline (which increases L-arginine availability for the L-arginine → NOS → NO pathway) with arginine nitrate (NO3-T®), which delivers both arginine directly and dietary nitrates (nitrate → nitrite → NO — a separate, additive pathway). The result is a broader nitric oxide stimulus than citrulline alone can produce. Agmatine sulfate adds NOS enzyme support, HydroMAX™ glycerol drives intramuscular hyperhydration, and AmentoMAX™ (Selaginella tamariscina extract) rounds out the pump matrix. No caffeine, no beta-alanine, no crash.
| Spec |
Detail |
| L-Citrulline |
4,000mg per serving |
| Arginine Nitrate (NO3-T®) |
2,000mg per serving (dual-pathway NO) |
| Agmatine Sulfate |
1,000mg per serving |
| HydroMAX™ Glycerol (65%) |
Intramuscular hyperhydration for pump |
| AmentoMAX™ |
Selaginella tamariscina extract |
| Vitamin C |
250mg (400% DV) |
| Flavours |
Black Cherry, Raspberry Lemonade, Melon Berry Twist, Blue Frost, Cotton Candy, Strawberry Kiwi, Sour Green Apple, Sour Peach Candy (8 total) |
| Stimulants |
Caffeine-free, beta-alanine-free |
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Dual nitric oxide approach — L-Citrulline (4g) + Arginine Nitrate (NO3-T® 2g) target two separate NO production pathways simultaneously
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Agmatine Sulfate 1,000mg — NOS enzyme support for sustained nitric oxide production
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HydroMAX™ Glycerol 65% — high-concentration glycerol for intramuscular water retention and pump
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AmentoMAX™ + Rutaecarpine — plant-based performance compounds for blood flow and thermogenic support
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Vitamin C 250mg — antioxidant support during intense training
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Caffeine-free, beta-alanine-free — no tingling, no stimulant crash, 8 flavours to choose from
Best for: Athletes who want a scientifically sophisticated pump pre-workout without stimulants — particularly those who appreciate the dual NO pathway approach. Excellent for evening training, stim stacking, or anyone who has maxed out their caffeine tolerance and needs more from their pump ingredients.
Not ideal for: Those who need caffeine or stimulant-based energy — High Volume is a pure pump formula. For a stimulant pre-workout from PEScience, see other options available at Bulldog Nutrition.
Key Active Ingredients (per 2-scoop serving): L-Citrulline (4,000mg), Arginine Nitrate — NO3-T® (2,000mg), Agmatine Sulfate (1,000mg), Taurine, HydroMAX™ Glycerol (65%), AmentoMAX™ (Selaginella tamariscina extract), Rutaecarpine, Vitamin C (250mg).
Allergens: No caffeine, no beta-alanine. Check label for full non-medicinal ingredient list and allergen declaration. Manufactured by PEScience in a GMP-compliant facility.
Who Is This For?
PEScience High Volume is for athletes who want maximal nitric oxide and pump from a caffeine-free, stimulant-free pre-workout — whether as a standalone or stacked with a separate stimulant source. The dual NO approach (citrulline + arginine nitrate) gives it a unique mechanism versus single-pathway pump products, making it the choice for athletes who've tried other pump products and wanted more.
Who Is This NOT For?
✗ Those looking for energy or focus support — zero stimulants ✗ Anyone expecting a complete pre-workout from a pump product ✗ Athletes who already use a pre-workout with high citrulline and don't need additional pump ingredients
Why Buy From Bulldog Nutrition?
Bulldog Nutrition is an authorized Canadian and US retailer of PEScience products. We source directly from the brand — never from grey market or unauthorized distributors — so every order is genuine and fresh.
- ✓ Authorized PEScience retailer — authentic products only, never grey market or counterfeit
- ✓ Ships across Canada and the US — fast, reliable delivery to your door
- ✓ 10+ years in business — a track record you can rely on
- ✓ 4.7/5 stars from 2,400+ verified customer reviews
- ✓ Ongoing support available — reach us anytime via email or live chat
