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EFX Sports
EFX Sports Karbolyn Fuel | Fast-Absorbing Carbohydrate Powder | Carb Load, Sustained Energy, Quick Recovery | Stimulant Free | 35 Servings
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50 g Fast-Absorbing Carbs
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Informed Sport Certified
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36 Servings Per Container
$49.99
Save $7.49 in Cart
50 g Karbolyn per scoop absorbs faster than dextrose for rapid glycogen loading without sugar crashes
Patented homopolysaccharide from potato, rice, and corn delivers sustained energy like complex carbs
Informed Sport Certified and 3X quality tested for banned-substance-free confidence
Sugar-free, gluten-free, stimulant-free, and vegan-friendly for any dietary protocol
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Marcus T.
Best pump formula I've ever used. Stim-free so I can stack it with anything. The vascularity is insane — highly recommend.
You'll Love This Formula
You'll Love This Formula
Rapid Glycogen Loading
50 g of Karbolyn per scoop is clinically shown to absorb 18.21% faster than pure dextrose, carb-loading your muscles in minutes instead of hours for immediate fuel availability.
Sustained Energy
The patented homopolysaccharide molecule from potato, rice, and corn delivers the fast onset of a simple carb with the sustained output of a complex carb - no bloating, no crashes.
Faster Recovery
Rapid glycogen replenishment post-workout means your muscles recover faster between sessions. Use after training to reload energy stores and reduce time to next session readiness.
Trusted Purity
Informed Sport Certified with 3X quality testing at every production stage. 100% banned-substance free, sugar-free, gluten-free, and vegan - manufactured entirely in-house by EFX Sports.
Transparency by the numbers
Transparency by the numbers
0 g
Carbs Per Scoop
Fast-absorbing carbohydrate fuel from a patented homopolysaccharide engineered for peak performance.
18.21%
Faster Than Dextrose
Clinically shown to absorb faster than pure sugar while delivering sustained complex carb energy.
0X
Quality Tested
Every batch passes three critical quality checkpoints - before, during, and after production.
* Based on post-purchase surveys and manufacturer data.
Why Karbolyn Outperforms Generic Carb Supplements
Why Karbolyn Outperforms Generic Carb Supplements
We only carry performance supplements with full clinical doses — because half-dosed ingredients deliver half the results. Transparency is non-negotiable.
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OUR CHAMPIONS
Keep Coming Back
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Performance FAQs
Got questions? We've got answers — plus free consultations at both Fort Wayne locations.
What's the difference between a pump formula and a pre-workout?
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Pre-workouts typically contain stimulants (caffeine) plus performance ingredients. Pump formulas are stimulant-free and focus entirely on vasodilation — increasing blood flow to muscles for better pumps, endurance, and nutrient delivery. They can be taken alone or stacked with a caffeinated pre-workout.
Can I take a stim-free pump formula at night?
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Yes — that's one of the biggest advantages of stim-free formulas. No caffeine means no sleep disruption, making them ideal for evening or late-night training sessions.
How do I know if a performance supplement is clinically dosed?
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Check the supplement facts panel. If you see exact milligram amounts for every ingredient (not hidden in a "proprietary blend"), it's transparent. Then cross-reference each ingredient against published research doses. Our staff can walk you through this — we check every product we carry.
Can I stack a pump formula with creatine?
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Absolutely. Creatine and a pump formula is one of the most effective performance stacks available — creatine increases strength and power output while the pump formula maximizes blood flow and muscle fullness. Mix creatine directly into your pump drink for convenience.
How long does the pump effect last?
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Most pump ingredients (like L-Citrulline and Agmatine) peak in the bloodstream within 60-90 minutes and provide effects lasting 2-3 hours. Taking your supplement 20-30 minutes before training optimizes the overlap with your actual workout.
Are performance supplements safe for women?
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Yes. Performance and pump supplements are safe and effective for women. Many female athletes use them to improve vascularity, endurance, and recovery. There are no hormone-affecting ingredients in standard pump formulas. Our staff can recommend the best options for your specific goals.
