AO Nutrition
Fuel
Your
Intensity
Clinically dosed pre-workouts with open labels. Real energy, real pumps, real focus. No proprietary blends, no mystery formulas.
The Fundamentals
What Makes a
Great Pre-Workout?
Most pre-workouts rely on huge caffeine doses and flashy labels to mask underdosed formulas. A truly effective pre-workout contains clinically studied ingredients at effective doses that work synergistically to boost performance across multiple pathways: vasodilation for pumps, lactic acid buffering for endurance, central nervous system activation for energy, and nootropic support for laser focus.
We curate our pre-workout selection based on ingredient quality, dosing transparency, and real-world results. Every product on our shelf has a full open label so you know exactly what you're putting in your body and at what dose.
No proprietary blends. No pixie-dusted formulas. Just clinically dosed ingredients that work.
What to Look For
Key Ingredients
at Clinical Doses
Citrulline Malate (6-8g)
The gold standard for nitric oxide production and muscle pumps. Citrulline converts to arginine in the kidneys more efficiently than supplementing arginine directly, driving vasodilation and nutrient delivery to working muscles. Anything under 6g is underdosed.
Beta-Alanine (3.2g)
Buffers lactic acid buildup by increasing intramuscular carnosine concentrations, allowing you to push through more reps before fatigue sets in. The clinical dose is 3.2g per day. Yes, the tingles are normal.
Caffeine (200-400mg)
The most well-researched performance enhancer in existence. Increases alertness, reduces perceived exertion, and improves both strength and endurance output. Choose your dose based on tolerance and training time.
Alpha-GPC / Tyrosine
Nootropics that sharpen focus and strengthen the mind-muscle connection. Alpha-GPC boosts acetylcholine for neural drive, while L-Tyrosine supports dopamine production under stress. The difference between going through the motions and training with intent.
Find Your Formula
High-Stim vs.
Stim-Free
High-Stimulant
Best for morning sessions and heavy training days. 300-400mg caffeine plus compounds like DMHA or eria jarensis for sustained, aggressive energy. Not recommended for evening workouts or stim-sensitive individuals.
Stim-Free
All pumps, all endurance, zero stimulants. Loaded with citrulline, glycerol, and nitrate sources. Perfect for evening workouts, stacking with your own caffeine source, or cycling off stimulants.
Moderate Stim
The middle ground. 150-250mg caffeine with balanced nootropics. Clean energy without the jitters or crash. Works for any time of day and any training style.
6-8g
Citrulline per Serve
3.2g
Beta-Alanine Clinical
300mg+
Caffeine High-Stim
100%
Open Labels
Train Harder,
Recover Faster
Browse our complete selection of pre-workout supplements. High-stim, moderate, and stim-free options. Every formula fully disclosed. Free shipping on orders over $100.