Take one serving 30 minutes before training or racing to prime your glycogen and electrolyte levels. During exercise, drink one serving every 30–45 minutes for efforts lasting over an hour. It works both as a pre-load and an during-effort fuel source.

EFS is the everyday training and racing workhorse — 30g carbs and 1,175mg electrolytes per serving. EFS-PRO doubles the carbohydrate content and increases electrolytes further, making it the choice for the most extreme efforts and conditions. If you're doing sessions over four hours or racing in serious heat, EFS-PRO is the step up.

Yes to both. EFS contains no gluten, no animal-derived ingredients, and no artificial flavors, colors, or sweeteners.

For efforts up to about two hours, EFS alone can cover most athletes' carb and electrolyte needs. For longer sessions or high-intensity racing where you need 90g+ of carbs per hour, stack EFS with First Endurance Liquid Shots to hit your target without adding bulk.

The glucose: fructose ratio in the EFS formula is 2:1 Glc:Fru.