SiS GO Hydro + Caffeine Cola combines electrolytes with 75 mg of caffeine in an easy-dissolving effervescent tablet. The low-carbohydrate drink provides sodium, potassium, calcium and magnesium in a convenient format for training and competition. Benefits Dissolves in water in approximately one minute; Non-carbonated once fully dissolved; Provides electrolytes with minimal carbohydrate; 75 mg of caffeine per serving; Low-calorie drink format; Tested under the Informed Sport programme for banned substances. Nutritional information per serving Fat — less than 0.5 g; Carbohydrate — 0.6 g; Sugars — 0.5 g; Protein — less than 0.5 g; Salt — 0.87 g; Caffeine — 75 mg; Vitamin B1 — 0.2 mg; Vitamin B2 — 0.3 mg; Vitamin B6 — 0.4 mg; Electrolytes — 37%: potassium, calcium, sodium and magnesium. Each tube contains 20 tablets. Directions for use Dissolve one tablet in 500 ml of water. The source suggests 500 ml three to four hours before training and a further 250 ml 30 minutes beforehand. During demanding exercise, use up to 500 ml of prepared drink per hour according to your fluid and sodium needs. Do not exceed four servings per day. Allow the tablet to dissolve fully. Consume within 24 hours of preparation. Contains caffeine. Not recommended for children, pregnant or breastfeeding women, or people sensitive to caffeine. For a carbohydrate-containing option, explore SiS GO Electrolyte Powder 1.6 kg .

A trial set containing two SiS energy gels. Ideal for anyone trying Science in Sport gels for the first time and looking to find out how well the products suit their individual fuelling needs. What's included? SiS GO Isotonic Energy Gel — 1 gel; SiS GO Energy + Caffeine Gel with 75 mg of caffeine — 1 gel. The isotonic gel does not need to be taken with water. The caffeine gel provides 75 mg of caffeine to help support concentration and alertness towards the end of a race or training session. IMPORTANT We do not recommend trying sports nutrition from any brand for the first time on race day. Test every new product during training, ideally during a long session. This will help you understand how your body responds and reduce the risk of unexpected problems during your event.

SiS BETA Fuel + Nootropics Gel combines maltodextrin and fructose with caffeine, Cognizin® citicoline, taurine and L-theanine. It is designed for later stages of long, demanding endurance events when both carbohydrate and a measured caffeine dose are required. The carbohydrate blend uses a 1:0.8 maltodextrin-to-fructose ratio, while the gel is tested under the Informed Sport programme for banned substances. How to use the gel Use during demanding exercise lasting more than two hours as part of your total carbohydrate strategy; Combine with other BETA Fuel products such as energy chews and high-carbohydrate gels ; The source suggests using the gel approximately one hour before the end of the race; Do not consume more than one BETA Fuel + Nootropics Gel per day; Practise using it in training before competition. Content per 60 ml gel 40 g of carbohydrate: maltodextrin from maize (30%) and fructose (23%); 19 g of sugars; 1 g of taurine; 0.03 g of sodium; 250 mg of Cognizin® citicoline; 200 mg of caffeine; 200 mg of L-theanine; Water, natural flavourings, acidity regulators, gelling agents and preservatives. High caffeine content: 200 mg per gel. Not recommended for children, pregnant or breastfeeding women, or people sensitive to caffeine. Do not combine with other high-caffeine products. Available in apple and lemon flavours.

Every set now comes in individual packaging with an on-course fuelling plan! Fast delivery guaranteed! The SiS Half Marathon Nutrition Set is designed for runners aiming to achieve their best over 21 km. It includes products covering three essential needs for the distance: hydration, energy and recovery. What's in the set? Energy Bar : a convenient carbohydrate snack to eat around 30 minutes before the start. SiS GO Isotonic Energy Gel — 1 gel; SiS GO Energy + Electrolyte Gel — 1 gel; SiS GO Energy + Caffeine Gel with 75 mg of caffeine — 1 gel for an energy boost over the final kilometres. Within 30 minutes of finishing, we recommend taking 30 g of SiS REGO Protein Powder to support recovery. Add the powder to a bottle of water and shake well. Free gift: every set includes a wristband showing when to take each gel during the race — 1 wristband. How to fuel for a half marathon On race morning, after breakfast, eat a carbohydrate bar for energy and drink 150–200 ml of SiS GO Electrolyte isotonic drink to top up your electrolytes. Take the first isotonic gel at around kilometre 5–6 and the second at around kilometre 12–13. You do not need to take them with water, but remember to drink at aid stations. Take the caffeine gel at around kilometre 16–17 to help you stay focused and increase your pace towards the finish. After finishing, take SiS Cherry Juice to support recovery. To restore fluid balance, use a Science in Sport electrolyte drink for 3–5 hours after the half marathon. Additional advice Remember that SiS sports nutrition is not a substitute for a balanced, healthy diet. Plan your meals several days before the half marathon and include carbohydrate loading, fruit and vegetables. After finishing, eat foods rich in protein, fibre and vitamins. The plan below shows the recommended sports nutrition before, during and after the race. You can also buy 42 km marathon sets and half-Ironman nutrition packs on our website. 21 km fuelling plan Read more about half marathon nutrition in our blog .