If you’ve ever felt like your legs were about to file for divorce halfway through a two-hour training ride, Science in Sport has brewed up a new companion for your pain cave. Meet the SIS BETA Fuel Energy Gel, the brand’s latest concoction of carbs and electrolytes aimed squarely at endurance athletes who sweat like a sinner in church and still want to win the sprint.

Now, this isn’t your average sickly-sweet sugar bomb. No, SiS has done its homework—probably while wearing lycra. Developed using insights from the world’s most masochistic athletes (read: endurance pros), the SIS BETA Fuel Energy Gel delivers 40 grams of carbohydrate in every sachet.

That’s thanks to a 1:0.8 ratio of maltodextrin to fructose, a pairing that science tells us boosts absorption and fuel efficiency during efforts longer than 90 minutes. Translation: your body burns it faster and better—so you don’t bonk like a rookie 10k fun-runner at mile five.

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But it’s not just about sugar. There’s also 200mg of sodium in the mix, thrown in to combat dehydration and prevent the dreaded salt-streaked jersey look. Because when you’re racing in heat, humidity, or some sadistic uphill time trial, fluid balance is as crucial as your FTP.

Dan Lampard, Chief Operating Officer at SiS, put it plainly: “We know the conditions endurance athletes face aren’t always predictable. The BETA Fuel Energy + Electrolyte Gel was created to give them a reliable, straightforward option that delivers energy and electrolytes together, helping them stay on track in both training and competition.”

That “straightforward option” now comes in a Raspberry & Lemon flavour, and you can get your hands on it in singles, or bundles of six or thirty—depending on how committed you are to self-punishment.

Available now exclusively at scienceinsport.com, it’s also been given the nod by Informed Sport, so no dodgy substances hiding in the packet—unless you count ambition.

Already in the kit bags of elite teams like British Cycling, Tottenham Hotspur, and the British & Irish Lions, this gel is more than just a sideline snack. It’s part of a modular fuelling strategy that includes SiS’s drinks and chews, helping athletes hit the golden benchmark of 90–120g of carbohydrate per hour. That’s the sort of math that separates those who cross the finish line from those who crawl across it.

Use 1–2 gels per hour for efforts over two hours or in the sort of heat that makes your socks squelch. Mix and match with other BETA Fuel products to build a fuelling plan that actually works for you—whether you’re chasing podiums or just trying to survive your next brick session.

So, if your current energy gel feels like a sugar-soaked betrayal and leaves your stomach plotting revenge, maybe it’s time to give SIS BETA Fuel Energy Gel a try. Because let’s be honest—your legs deserve better.