What's Inside Stim-Pre-Pump
Every ingredient, every dose — right here, nothing hidden. This is exactly what's in Stim-Pre-Pump and why it's there, so you know precisely what you're putting in your body before every session.
Full Transparency, No Proprietary Blends
Most pre-workouts hide behind proprietary blends — a single combined number that lets brands under-dose the ingredients that matter. We don't. Every active in Stim-Pre-Pump is listed with its exact dose, fully disclosed. What you see on the label is what's in the scoop.
Serving size: Approx. 1 scoop (26.84g) · Servings per container: 30
The Formula, Broken Down
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The pump engine. L-Citrulline converts to L-arginine and boosts nitric oxide, supporting blood flow and those full, vascular pumps. At a full 10g — multiples of what most pre-workouts bother to include — this is dosed to actually be felt.
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The endurance ingredient. Beta-alanine supports muscle carnosine levels, which helps buffer the fatigue that builds up during hard sets. It's also what causes that tingling skin sensation — harmless, and a sign it's working.
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Sourced from beets, betaine is included to support power output and strength performance, and it helps with cellular hydration so your muscles stay primed under load. A clinically common 3g dose.
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An amino acid that supports hydration, endurance, and focus while you train. Taurine helps muscles hold water and is often paired with caffeine for smoother, more sustained energy.
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Derived from L-arginine, agmatine helps support and prolong nitric oxide activity — stacking with the citrulline to extend pumps and blood flow deeper into your session.
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Standardized to 98% L-Dopa, a direct precursor to dopamine. Included to support drive, mood, focus, and that locked-in "want to train" mindset before you even touch a barbell.
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An amino acid that supports the neurotransmitters behind focus and mental sharpness, helping you stay dialed in when the stimulants kick up your intensity.
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The core stimulant — 220mg for strong, clean energy, alertness, and focus. Enough to drive serious training without tipping into a jittery overload.
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A gentle, longer-acting stimulant found in cacao. Paired with caffeine, it smooths out the energy curve and supports blood flow — helping you avoid a sharp crash.
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A key electrolyte for hydration and muscle function, supporting pumps and performance — especially as you sweat through harder sessions.
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A traditional adaptogenic root, included to round out the formula's support for recovery and overall resilience under training stress.
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Standardized to 1% ginsenosides, Panax ginseng is a classic adaptogen used to support energy, focus, and endurance — complementing the stimulant and nootropic side of the blend.
How to Take It
Mix one scoop with 12–16 oz of water and drink it about 20 minutes before training. If you're new to high-stim pre-workouts, start with half a scoop to assess your tolerance.
Other Ingredients
Malic Acid, Silica, Natural and Artificial Flavors, Citric Acid, Sucralose, Fruit and Vegetable Juice (for color), Acesulfame Potassium.
Label Transparency
Products by Rein Nutrition are not evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Always consult your doctor before use. **Daily Value Not Established.
