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Home / Shop / Electrolytes & Hydration / SIS Rego Rapid Recovery Drink

A 500g stand-up pouch of SIS Rego Rapid Recovery powder in Vanilla flavor, featuring a white and black design with red graphic accents, set against a light gray background.

A 500g stand-up pouch of SIS Rego Rapid Recovery powder in strawberry flavor, featuring a white and black design with red graphic accents on a light gray background.

Person drinking from a SIS (Science in Sport) water bottle outdoors.

SiS Rego Rapid Recovery package and shaker bottle with strawberries on a reflective surface.

Three packages of SIS Rego Rapid Recovery on grass with a sports field background

A stand-up pouch of SIS Science in Sport Rego Rapid Recovery powder, chocolate flavor, 500g. The packaging is white with a black top section, a red and white graphic pattern on the left, and black text.

Package of Science in Sport REGO Rapid Recovery on a white background

A 1.5kg bag of SIS Science in Sport Rego Rapid Recovery chocolate flavored powder, shown on a clean light gray background.

SiS

SIS Rego Rapid Recovery Drink

£17.99 /

A post-workout recovery drink combining plant-based soya protein, carbohydrate and added L-leucine in one easy mix.

Quantity Size: 5 Serve Pouch (500g)

5 Serve Pouch (500g) 15 Serve Pouch (1.5kg)

Flavour: Vanilla

Vanilla Chocolate Strawberry

Product variants

Quantity

In stock. Delivery 3-5 Days. Free UK delivery over £50

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Key Benefits

Plant-Based Protein — Approximately 21–22g protein per 50g serving, depending on flavour.
Carbohydrates for Refuelling — Approximately 22–23g carbohydrate per serving.
Added L-Leucine — 2.5g per serving alongside the soy protein profile.
Vitamins and Minerals — Includes selected B vitamins, vitamin C and minerals.
Simple Post-Workout Mix — Prepare with water after demanding training.

SiS REGO Rapid Recovery Drink is a post-exercise powder developed to help athletes refuel after demanding training and competition. Combining soya protein with carbohydrate, it offers runners, cyclists, triathletes and gym users a convenient option when a prepared recovery meal is not immediately available.

A 50g serving provides approximately 21–22g protein and 22–23g carbohydrate, depending on flavour, together with added L-leucine and selected vitamins and minerals. Protein contributes to the growth and maintenance of muscle mass, while carbohydrate can help replenish energy stores after exercise. Mixed with cold water, REGO is an easy addition to a structured recovery routine following hard or repeated sessions.

Nutrition & Ingredients

Nutritional information

Serving: 50g powder (prepare with 500ml water).

Manufacturer typical values per 50g serving:

Chocolate: 747kJ / 177kcal; fat 0.4g (saturates 0.2g); carbohydrate 22g (sugars 1.5g); protein 21g; salt 1.2g.

Vanilla: 755kJ / 179kcal; fat 0.1g (saturates 0g); carbohydrate 23g (sugars 1.6g); protein 22g; salt 1.2g.

Strawberry: 753kJ / 178kcal; fat 0.1g (saturates 0g); carbohydrate 23g (sugars 1.7g); protein 21g; salt 1.2g.

L-Leucine: 2.5g per 50g serving.

Includes vitamins and minerals; refer to flavour label for the full vitamin/mineral panel and nutrient reference values.

Ingredients

Chocolate (manufacturer): Soya protein isolate (48%), maltodextrin (40%), fat-reduced cocoa powder, flavourings, L-leucine, sodium chloride, sweetener (sucralose), vitamin and mineral blend, thickener (xanthan gum).

Vanilla (manufacturer): Soya protein isolate (51%), maltodextrin (44%), flavourings, L-leucine, sodium chloride, vitamin and mineral blend, thickener (xanthan gum), sweetener (sucralose).

Strawberry (manufacturer): Soya protein isolate (50%), maltodextrin (44%), L-leucine, flavourings, sodium chloride, colour (beetroot red), citric acid, vitamin and mineral blend, xanthan gum, sucralose.

Allergens

Contains SOYA. SiS states that the product is produced in a facility which also handles milk. Check each supplied flavour label for the full current declaration.

Suggested Use & Compatibility

Suggested use

Add 50g of powder (approximately two full scoops) to 500ml of cold water and shake thoroughly. Weighing the portion gives the most accurate serving. SiS recommends consuming within 30–60 minutes after exercise.

Recovery compatibility

Use as part of your overall daily nutrition and recovery routine after demanding training or competition. It is based on soya protein rather than milk protein; check the allergen information before use and account for protein and carbohydrate from other meals.

Why We Choose SiS

We choose SiS - Science in Sport because they create trusted sports nutrition products designed to help athletes fuel, hydrate and recover with confidence. From isotonic energy gels and electrolyte tablets to recovery drinks and advanced endurance fuelling, SiS supports runners, cyclists, triathletes and active individuals before, during and after training and racing.

Science-Led – Developed with a clear focus on sports science, performance nutrition and real-world athlete needs.

Easy to Use – Practical fuelling solutions such as isotonic energy gels that are simple to take during exercise, with no unnecessary complexity.

Endurance Focused – Designed to support sustained energy, hydration and recovery across running, cycling, triathlon and high-intensity training.

Trusted by Athletes – Used by everyday athletes and elite performers who need reliable nutrition when performance matters.

That’s why SiS is part of the North Sports collection — giving you proven sports nutrition to fuel harder sessions, support recovery and perform at your best.