2023 First Endurance EFS Energy Drink 30 Serving 2.1lbs / 960G
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EFS Electrolyte Drink
So much more than just a hydration mix
The new EFS provides premium nutrition that supports physical and mental performance for elite athletes, redefining the limits of endurance nutrition so you can redefine the limits of endurance.
KEY BENEFITS ✓ Improves mental toughness & sharpens your competitive edge ✓ Prevents cramping & helps you hydrate fast ✓ Provides immediate & sustained fuel when you need it most
In addition to unlocking the mental game, EFS pushes cramp prevention and continuous fueling to new levels.
It includes all five electrolytes totaling 1,160mg. That’s twice the amount of traditional mixes, and—since we improved the flavor—it tastes great at full concentration (or beyond).
There’s no need to dilute it and supplement with electrolyte tabs just to make it palatable. It’s also got more carbs from more sources, including complex carbs for prolonged energy and high-glycemic carbs for immediate use.
Bioavailability is the best ability From the carbohydrates (osmotically balanced with your body in a 7% solution) to the electrolytes (20-100% better absorption rates), every ingredient in EFS is selected and portioned for faster and easier absorption without GI distress.
The inclusion of citric and malic acids also encourages oxygen uptake and production of ATP (the body’s energy source), helping your cells use the fuel once it’s delivered.
Premium ingredients for purity and purpose We prioritize purity by using only Suntheanine, the original and cleanest L-theanine, and free-form amino acids, which have a purity level of 99-100%.
We also omit ingredients with no value—even the ubiquitous vitamin C, which features in virtually every other mix despite research that shows it reduces endurance when taken during exercise. EFS still provides immune system support courtesy of theanine, just without impacting performance.
No respect for the status quo Our approach to product design eschews unexamined ingredients, traditional processes, and trendy minimalism in favor of research-based innovation, premium ingredient sourcing, and the uncompromising expectations of elite athletes. We’re always ready to show our work and support our products with the scientific literature that informs our design choices, but we also know what virtually every athlete and publication using or reviewing our products learns firsthand: First Endurance products speak for themselves, and you can feel the difference right away.