Science in Sport GO Electrolyte Review — Is It Worth It?

Science in Sport GO electrolytes is a genuine sports electrolyte powder rather than a flavoured mineral capsule. It's designed for endurance athletes and serious gym-goers, with added carbohydrates for sustained energy delivery during prolonged exercise. That makes it a different category from simple electrolyte tablets.

What Is It?

GO Electrolyte is SiS's isotonic sports drink powder — one of their most established products and widely used by elite endurance athletes, running clubs, and cycling teams across the UK. It combines carbohydrate (maltodextrin and fructose) with a full electrolyte profile to support hydration and performance during sustained exercise.

Ingredients & Nutrition

Per 40g serving: 36g carbohydrates (maltodextrin and fructose in approximately 2:1 ratio), 330mg sodium, 45mg potassium, 20mg magnesium. At 140 calories per serving.

The 2:1 maltodextrin:fructose carbohydrate ratio is specifically designed to maximise intestinal carbohydrate absorption rates — a formulation detail supported by research showing this ratio allows up to 90g of carbohydrate absorption per hour versus ~60g with single carbohydrate sources. This matters for endurance athletes.

The caloric content distinguishes this from pure electrolyte supplements — GO Electrolyte is an energy drink with electrolytes, not just an electrolyte supplement.

Taste & Mixability

Orange, Lemon, Berry, and Tropical are all clean, light, and non-sickly — specifically formulated to remain palatable during sustained exercise when sweetness fatigue is common. Mixability is excellent; the powder dissolves completely in water. The isotonic concentration (one serving in 500ml) is optimised for rapid gastric emptying.

Effectiveness

For exercise lasting over 60–90 minutes, carbohydrate and electrolyte replacement are essential for performance maintenance. GO Electrolyte is specifically designed for this use case and is backed by SiS's investment in sports science research. The 2:1 carbohydrate ratio delivers on what it promises for endurance performance.

For gym sessions under 60 minutes or strength training, the carbohydrate load is unnecessary — a pure electrolyte product or water is more appropriate.

Value for Money

At £14.99 for 500g (approximately 12 servings at 40g), you're paying approximately £1.25 per serving. That seems high, but the product serves a different purpose to pure electrolyte supplements — it's a complete intra-exercise fuel. For endurance athletes, this is competitive with gels and isotonic drinks.

Verdict

GO Electrolyte is an excellent product for its intended use — sustained endurance exercise over 60 minutes. For cyclists, runners, or anyone doing long gym sessions, it delivers both carbohydrate energy and electrolyte replacement in a well-formulated, palatable product. For strength training or short gym sessions, it's unnecessary and overpriced relative to pure electrolyte products.

Rating: 7/10