GU Energy Gel (Caffeine)

GU created the first energy gel in 1993 when Dr. Bill Vaughan wanted to help his ultra-running daughter. Three decades later, they’re still the gold standard for portable endurance fuel.

Why GU Energy Gels Hit Different

GU Energy Gels pack 100 calories, ~22 g carbs, ~60 mg sodium, and 450 mg amino acids in a portable packet. The dual-carb approach using maltodextrin and fructose maximizes absorption while minimizing stomach distress.

The sodium helps your body efficiently absorb fuel, while amino acids protect muscles from breakdown and help prevent mental fatigue.

Flavor Game Strong

GU offers one of the most extensive flavor lineups in the gel game.

High-caffeine options (40 mg): Caramel Macchiato, Espresso Love, Cola Me-Happy, and Jet Blackberry.

Moderate caffeine (20 mg): Salted Watermelon, Chocolate Outrage, Vanilla Bean, Salted Caramel, Mandarin Orange, Triberry

Caffeine-free: Strawberry Banana, Birthday Cake, Campfire S’mores, Pumpkin Spice, Lemon Sublime, and Raspberry Lemonade.

How to Use Them

For workouts under an hour: Take one gel 5 minutes before activity.

For longer efforts: Consume one gel every 20-30 minutes. Always take with water for optimal absorption.

Pro tip: Test in training before race day.

The Verdict

GU Energy Gels aren’t just fuel—they’re the fuel that started it all. Chocolate Outrage was one of the original flavors from 1993 and remains a favorite today. Whether you’re grinding out intervals or pushing through mile 20, GU delivers reliable energy that's fueled countless PRs and podium finishes.