“Proving there was a market for high-end nutritional supplements for distance freaks, First Endurance has found success in becoming the Ferrari of sports-supplement companies.”
“First Endurance produces supplements that deliver on their promise, thanks to clinically proven dosages of endurance boosting ingredients.”
“I'm honestly surprised at how good I feel everyday.”
Substantial Carbs Per Hour
“EFS-PRO hits the mark when it comes to easiness on the gut.”
Tastes Amazing
“EFS-PRO keeps me well-fueled and tastes amazing.”
Game Changer
"The new EFS-PRO formula is a game changer!"
Latest Posts
Salubrious Gelato in the Italian Alps
By Larry Warbasse, Decathlon–AG2R La Mondiale Team
In his latest missive from the WorldTour, Larry is once again at altitude – but in very different circumstances: enjoying a rest day at 6k.
When To Use EFS-PRO vs EFS
By First Endurance
The new EFS and EFS-PRO High Carb formulas are engineered to deliver more fuel and more electrolytes with less bellyache than their predecessors (and, incidentally, than any other hydration mixes). But why have a standard and a PRO?
EFS UPDATE – MEETING MODERN DEMANDS
By Dr. Luke Bucci, PhD
The new EFS is here, and its architect – our own Dr. Luke Bucci – wrote up a quick intro to explain what was changed and what stayed the same.
Introducing: EFS-PRO High carb
By First Endurance
We just launched a new, re-engineered EFS-PRO. The conversations, surveys, and prototyping we’ve done with many of you are why. And while the formula and the research that went into it are complicated, the entire project is really about one word: Carbs.
Altitude Camp on Mt. Etna
By Larry Warbasse
Larry gives us a look at how he eats, recovers, and maximizes gains on the slopes of the legendary climb.
No Sleep Till Bogota
With Rob Britton and Griffin Easter
Transcordilleras is a gravel epic through the Colombian Andes over 600 miles. First Endurance athletes Rob Britton & Griffin Easter share their adventure.