The best running gels to boost your training

SiS GO Isotonic Energy Gel

 It’s vital for marathon runners to consume a good amount of carbohydrates for the highest level of performance possible. A gel in the middle of a race may be exactly what you need to motivate yourself to keep going and to push yourself to your limit! Isotonic gels are absorbed quickly and so won’t irritate your stomach if you consume them during exercise.

£1.40, scienceinsport.com