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GO Energy Isotonic Sports Drink

An orange-flavoured, ready-to-drink solution, scientifically formulated to encourage energy and performance during exercise

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From £2.50

Member £2.25

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INGREDIENTS

Nutritional Information

100% APPROVED

Informed Sport

Next Day Delivery

Nutritional Information

All Science in Sport products are certified under the strict guidelines of the INFORMED Sport Programme. To achieve this, an independent organization (LGC Assure) with an accredited, independent laboratory that’s been testing for banned substances for over 20 years, rigorously tests our products to detect all compounds on the World Anti-doping Association Banned Substances list.

Informed Sport

Providing assurance for athletes, All INFORMED Sport certified Science in Sport products are rigorously tested, screening for all compounds on the WADA Banned Substances list.

How It's Tested

1. Product Review

2. Lab Tests (3+)

3. Batch Tests

4. Random Tests

Supplement Testing Labs

Driven by innovation and excellence, INFORMED Sport is the leading independent supplement testing provider, specialising in drug surveillance, doping control and supplement analysis.

Next Working Day Delivery Information:

Weekdays: Orders placed before 6:30pm will be delivered the next day - including on Saturdays.
Weekends: Orders placed before 1pm will be delivered the next day - including Sundays.
Bank Holidays: Orders will not be delivered on Bank Holidays. Any orders placed on a Bank Holiday will not be collected from our warehouse until the next non-holiday day, for delivery the following day.

Please note that Next Day Delivery excludes these postcodes: AB31-56, BF (all), BT (all), FK17-21, GY (all), HS (all), IM (all), IV (all), KA (all), KW (all), PA20-80, PH (all), TR21-25, ZE (all)

Please see specific promotion Terms & Conditions for details BFPO Addresses We do ship to BFPO addresses (with Royal Mail) but for active combat zones there is a strict 2kg weight limit (as with all deliveries to BFPO addresses), so please take this into account when ordering. As a guide, with careful packaging we can just get away with a 1.6kg tub. All orders under this weight limit will be treated as standard UK orders. All orders over this weight will be priced incrementally according to their weight (£5 per 2kg increase). If you have any queries regarding a BFPO address, please contact our Customer Service Team who will be happy to assist with your order.

POWER YOUR PERFORMANCE

Enhance your training and competition with GO Energy Isotonic Sports Drink - fast-acting carbohydrates and electrolytes to support your energy levels when you need it most.

SUSTAIN INTENSITY

With 60g of carbohydrate per bottle1  for improved performance

KEY ELECTROLYTES

Contains B Vitamins and 350mg of sodium per bottle 

ISOTONIC FORMULATION

Quick absorption of water and electrolytes into your bloodstream

NO FUSS FUELLING

Delivered in a convenient, ready-to-drink format

  1. Vitamin B1 & B2 contribute to carbohydrate conversion
  2. Vitamin B6 aids protein metabolism.
Archie Gray drinking a bottle of GO Energy Isotonic Sports DrinkArchie Gray drinking a bottle of GO Energy Isotonic Sports Drink

ENERGY THAT WORKS AS HARD AS YOU DO

Stay energised and performance-ready with GO Energy Isotonic Sports Drink — expertly designed to fuel your body before and during exercise. Packed with fast-acting carbohydrates, sodium, and B vitamins, it helps contribute to the recovery of normal muscle function and a reduction of fatigue during and after high-intensity exercise. By maintaining your carbohydrate availability, your performance outcomes, stamina, skill, and speed can all be improved.

Can also be consumed before and after exercise to promote muscle and liver glycogen storage in preparation and in recovery from intense training and competition.

WHY CHOOSE?

  • Starting sessions with fully stocked glycogen stores supports peak performance in both endurance and team sports.
  • Provides a highly convenient solution to support carbohydrate intake during exercise.
  • Delivers 60g of fast-acting carbohydrate and 350mg of sodium per 500ml bottle.
  • Helps restore sodium lost through sweat.
  • Suitable for both team sports and endurance athletes for durations of up to 2 hours, promoting both physical and technical performance.
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SUGGESTED USE

For team sport athletes, the SiS GO Energy Isotonic Sports Drink can be consumed pre-match, at half-time, and during natural breaks in play. It can also be used as part of match day-1 and match day+1 protocols, to promote glycogen storage and recovery.1

For optimal fuelling during exercise, consume up to 1 bottle per hour of exercise, with a strategy of one-third of a bottle every 20 minutes to deliver 3 x 20g carbohydrate per hour. Shake well before use.

ENGINEERED FOR ENDURANCE

FORMULATED BY SCIENCE

Containing twice the carbohydrate of traditional sports drinks and designed for convenient use before, during or after exercise, it facilitates glycogen storage, promotes carbohydrate availability and accelerates glycogen resynthesis, thereby supporting sustained athletic performance1.

FUEL WITH CARBOHYDRATES

For optimal performance during long workouts, aim for 60-90 grams of carbohydrate intake per hour. For maximum effectiveness, drink 1/3 of the bottle every 20 minutes.

 

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FUEL WITH CARBOHYDRATES

Depletion of both muscle and liver glycogen stores during prolonged physical activity is a primary contributor to the onset of fatigue. Depending on the intensity and duration of exercise, significant reductions in muscle glycogen concentrations, particularly within both type I and type II muscle fibres, can occur within 1 to 2 hours of continuous activity.

To mitigate premature fatigue and maintain exercise performance, it is critical that athletes begin each session with adequately replenished whole-body glycogen stores. This approach aligns with the “fuel for the work required” paradigm, whereby athletes strategically tailor their daily and per-meal carbohydrate intake based on anticipated training loads or competitive demands. In endurance-based activities, insufficient pre-exercise glycogen availability accelerates the onset of fatigue, often resulting in reduced power output or pacing. Similarly, in intermittent high-intensity sports (e.g. team sports), suboptimal glycogen levels have been associated with decreased total distance covered, diminished repeated sprint capacity, and impairments in technical execution.

To sustain carbohydrate availability and optimise rates of carbohydrate oxidation during exercise, the ingestion of carbohydrate during activity is recommended. This strategy serves to attenuate liver glycogen depletion, stabilise plasma glucose levels, and ensure continuous carbohydrate delivery to the working muscles.

Consumption of carbohydrate during endurance exercise within the dose of 30-60 g per hour has been scientifically proven to improve exercise performance by maintaining target training intensity, race pace and delaying the onset of fatigue. In team sport contexts, similar benefits have been observed, including improved physical outputs (e.g. sprinting and distance covered) and enhanced technical performance metrics (e.g. passing accuracy, dribbling efficiency, and shooting precision).

The GO Energy Isotonic Sports Drink offers a convenient and effective fuelling and hydration solution to support glycogen storage and resynthesis, before, and after exercise, alongside maintaining carbohydrate availability during exercise. Its formulation is designed to optimise carbohydrate availability and promote (re)hydration, making it a practical tool for athletes aiming to sustain high performance across training and competition.

1. Saltin (1973). Metabolic fundamentals in exercise. Med Sci Sports Exerc, 5(3): 137-146.

2. Krustrup et al. (2006). Muscle and blood metabolites during a soccer game: implications for sprint performance. Med Sci Sports Exerc, 38(6):1165-1174.

3. Mohr et al. (2022). Muscle glycogen in elite soccer – a perspective on the implication for performance, fatigue, and recovery. Front Sports Active Living, 4: 876534.

4. Mohr et al. (2002). Extended match time exacerbates fatigue and impacts physiological responses in male soccer plays. Med Sci Sports Exerc, 55(1): 80-92.

5. Williams and Rollo (2015). Carbohydrate nutrition and team sport performance. Sports Med, 45(1): 80-92.

6. Ali and Williams (2009). Carbohydrate ingestion and soccer skill performance during prolonged intermittent exercise. J Sports Sci, 27(14): 1499 – 1508.

7. Stellingwerff and Cox (2014). Systematic review: Carbohydrate supplementation on exercise performance of varying durations. Appl Physiol Nut Met, 39(9): 998-1011.

8. Gonzalez et al. (2015). Ingestion of glucose or sucrose prevents liver but not muscle glycogen depletion during prolonged endurance-type exercise in trained cyclists. Am J Physiol Endocrinol Metab, 309(12): E1032-1039.

9. Harper et al. (2017). The influence of a 12% carbohydrate-electrolyte beverage on self-paced soccer-specific exercise performance. J Sci Med Sport, 20(12): 1123-1129.

10. Rodriguez-Guistiniani et al. (2019). Ingesting a 12% carbohydrate-electrolyte beverage before each half of a soccer match simulation facilitates retention of passing performance and improves high-intensity running capacity in academy players. Int J Sport Nutr Exerc Metab, 29(4): 397-405.

11. Burke et al. (2016). Postexercise muscle glycogen resynthesis in humans. J Appl Physiol, 122(5): 1055-1067.

12. Bandelow et al. (2010). The effects of exercise, heat, cooling and rehydration strategies on cognitive function in football players. Scand J Med Sci Sports, 20: 148-160.

13. McGregor et al. (1999). The influence of intermittent high-intensity shuttle running and fluid ingestion on the performance of a soccer skill. Journal of Sport sciences, 17(11): 895-903.

14. Edwards et al. (2007). Influence of moderate dehydration on soccer performance: physiological responses to 45 min of outdoor match-play and the immediate subsequent performance of sport-specific and mental concentration tests. British journal of sports medicine, 41(6), 385-391.

STAMINA, SKILL, AND SPEED

Staying properly hydrated supports muscle performance, speeds up recovery, and sustains mental focus.

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STAMINA, SKILL, AND SPEED

In addition to carbohydrate provision, the inclusion of electrolytes can provide a further performance benefit by replacing some of those that are often lost in sweat during exercise. The provision of electrolytes, particularly sodium, during exercise can help to improve sodium balance during exercise, thereby stimulating thirst, promoting hydration and fluid retention during exercise. For these reasons, the GO Energy Isotonic Sports Drink is especially beneficial during exercise completed in warmer training or competitive conditions and when sweat rate is higher than normal, thereby supporting thermoregulation and overall physiological and perceptual function.

1. Harper et al. (2017). The influence of a 12% carbohydrate-electrolyte beverage on self-paced soccer-specific exercise performance. J Sci Med Sport, 20(12): 1123-1129.

2. Rodriguez-Guistiniani et al. (2019). Ingesting a 12% carbohydrate-electrolyte beverage before each half of a soccer match simulation facilitates retention of passing performance and improves high-intensity running capacity in academy players. Int J Sport Nutr Exerc Metab, 29(4): 397-405.

3. Bandelow et al. (2010). The effects of exercise, heat, cooling and rehydration strategies on cognitive function in football players. Scand J Med Sci Sports, 20: 148-160.

4. McGregor et al. (1999). The influence of intermittent high-intensity shuttle running and fluid ingestion on the performance of a soccer skill. Journal of Sport sciences, 17(11): 895-903.

5. Edwards et al. (2007). Influence of moderate dehydration on soccer performance: physiological responses to 45 min of outdoor match-play and the immediate subsequent performance of sport-specific and mental concentration tests. British journal of sports medicine, 41(6), 385-391.

Reviews

Reviews

5/5
1 reviews

by Ashleigh

09/10/2025

Enjoyed the product

Nutrition Overview Science Reviews