Ideal for your long-distance training run or marathon race, the Science in Sport SiS Beta Fuel 15 Sachet uses a high amount of carbs to keep you fueled for hours. Each packet supplies a whopping 80 grams of carbs along with a mix of electrolytes and its isotonic formula makes for easy digestion. We recommend consuming the Beta Fuel before and during your multi-hour runs for the most effective results. During your long runs lasting over 2.5 hours, take 1 packet with 500 ml of water per hour for complete hydration.
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