GU Energy Labs
GU Energy Labs is an American sports nutrition brand founded in Berkeley, California in 1993 — one of the first companies to develop the concentrated energy gel format that is now the standard fuelling strategy for endurance cycling, running, and triathlon. GU's original Energy Gel, formulated by physician Dr. Bill Vaughan for his daughter's ultramarathon racing, was the first gel product to be widely adopted by endurance athletes and established the category that now defines sports nutrition. What Does GU Energy Make and Who Uses Their Products? GU produce a comprehensive range: their original Energy Gel (100 calories, 25 flavours, with or without caffeine), the Roctane Ultra Endurance Gel (an enhanced formula with extra amino acids, more sodium, and optional caffeine for races over 2 hours), Chews (chewable energy blocks for riders who prefer solid fuelling), Stroop Waffles (a Belgian waffle-inspired energy snack for steady-state riding), and the Roctane Drink Mix for sustained fuelling over long events. Why Choose GU for Cycling Nutrition? GU are the originals in energy gel nutrition — 30 years of refinement have produced products that genuinely work for the widest range of athletes and conditions. Their flavour range means almost every athlete finds something they can stomach deep into a long race or sportive, and their sodium content is properly calibrated for endurance athletes rather than the fitness-class market. For long-distance cyclists who need reliable fuelling t