The Science in Sport Go Isotonic Energy + Caffeine Gel is built for riders and endurance athletes who want quick energy plus a noticeable caffeine boost in one sachet. What makes it stand out is the isotonic format, which is designed to be taken without extra water. That’s a real advantage when you’re on the limit, your bottles are running low, or you simply want fuelling to be as straightforward as possible.

In use, this style of gel is well suited to high-intensity efforts, races, hard bunch rides, long climbs, and the later stages of endurance sessions when focus can fade. The texture is generally regarded as easy to get down, with a milder flavour profile than many thicker, sweeter gels, so it’s a practical option if you struggle with heavy, sticky gels or flavour fatigue.

Because each gel carries 75 mg of caffeine, we’d treat it as a strategic fuelling tool rather than an all-day, every-20-minutes gel. It works best when you want a mental lift, sharper alertness, and a late-session boost, whether that’s before the start of a short, intense event or in the final part of a longer ride. If you already know caffeine sits well with you, this is a very convenient way to keep your fuelling simple when the pace is on.

Ideal for riders, runners and triathletes who want an easy-on-the-stomach gel with added caffeine for race efforts, hard training, or the closing stages of long endurance sessions.