A stand-up pouch of SIS Rego Whey Protein vanilla flavor, 450g, on a light gray background.
A 450g stand-up pouch of SIS Rego Whey Protein in vanilla flavor, featuring a white and black design with a red patterned accent on the lower left.
A bag of SIS Rego Whey Protein chocolate flavor next to a matching SIS shaker bottle with chocolate powder inside, set against a dark gray background.
A stand-up pouch of SIS Rego Whey Protein powder in Strawberry flavor, shown on a clean light gray studio background.
A stand-up pouch of SIS Rego Whey Protein chocolate flavor, 450g, on a light gray background.
A 1.5kg bag of SIS Science in Sport Rego Rapid Recovery chocolate flavored powder, shown on a clean light gray background.
A 1.35kg bag of SIS Rego Whey Protein powder in strawberry flavor, displayed on a clean light gray background.
A 1.35kg bag of SIS Rego Whey Protein powder in Vanilla flavor, featuring a silver and black design with a red graphic accent on a light gray background.
A stand-up pouch of SIS Rego Whey Protein vanilla flavor, 450g, on a light gray background.
A 450g stand-up pouch of SIS Rego Whey Protein in vanilla flavor, featuring a white and black design with a red patterned accent on the lower left.
A bag of SIS Rego Whey Protein chocolate flavor next to a matching SIS shaker bottle with chocolate powder inside, set against a dark gray background.
A stand-up pouch of SIS Rego Whey Protein powder in Strawberry flavor, shown on a clean light gray studio background.
A stand-up pouch of SIS Rego Whey Protein chocolate flavor, 450g, on a light gray background.
A 1.5kg bag of SIS Science in Sport Rego Rapid Recovery chocolate flavored powder, shown on a clean light gray background.
A 1.35kg bag of SIS Rego Whey Protein powder in strawberry flavor, displayed on a clean light gray background.
A 1.35kg bag of SIS Rego Whey Protein powder in Vanilla flavor, featuring a silver and black design with a red graphic accent on a light gray background.

SiS

SIS Rego Whey Recovery Protein

£24.99

Whey protein recovery powder delivering 22g protein per 30g serving, with minimal carbohydrate.

Quantity Size: 15 Serve Pouch (450g)
Flavour: Vanilla
American Express
Apple Pay
Google Pay
Klarna
Maestro
Mastercard
PayPal
Shop Pay
Visa
In stock. Delivery 3-5 Days. Free UK delivery over £50
Secure checkout Protected payment
30-day returnsView policy
Key Benefits
  • 22g Whey Protein Per Serving — Supports muscle maintenance and growth.
  • Protein-Led Formula — Lower carbohydrate than recovery drink mixes.
  • Complete Protein Source — Includes essential amino acids.
  • 30g Serving — Easy to measure and prepare.
  • Three Flavours — Vanilla, Chocolate and Strawberry.

SiS REGO Whey Recovery Protein is a whey-based powder for athletes who want an easy way to add protein after training. With approximately 22g protein per 30g serving and comparatively little carbohydrate, it suits sessions where refuelling requirements are lower or carbohydrate is supplied through food.

The powder mixes with water for a straightforward post-workout shake and is available in Vanilla, Chocolate and Strawberry. Supplied in 450g and 1.35kg pouches, it is useful for regular gym training, shorter endurance sessions and general protein intake as part of a balanced diet.
Nutrition & Ingredients

Values are per 30g serving for both 450g (15-serving) and 1.35kg (45-serving) packs.

Vanilla – 30g serving

488kJ / 118kcal; protein 22g; carbohydrate 2.2g (sugars 1.4g); fat 2.0g (saturates 1.3g); salt 0.20g; L-leucine 2.8g.

Ingredients: Whey Protein Concentrate (Milk) (94%) (with Emulsifier: Lecithins), Flavourings, L-Leucine, Thickener (Xanthan Gum), Salt, Sweetener (Sucralose).

Allergen advice: Contains milk.

Chocolate – 30g serving

483kJ / 117kcal; protein 21g; carbohydrate 2.4g (sugars 1.4g); fat 2.1g (saturates 1.3g); salt 0.25g; L-leucine 2.8g.

Ingredients: Whey Protein Concentrate (Milk) (88%) (with Emulsifier: Lecithins), Fat Reduced Cocoa Powder, Flavourings, L-Leucine, Thickener (Xanthan Gum), Salt, Sweetener (Sucralose).

Allergen advice: Contains milk.

Strawberry – 30g serving

488kJ / 118kcal; protein 22g; carbohydrate 2.0g (sugars 1.5g); fat 2.0g (saturates 1.3g); salt 0.20g; L-leucine 2.8g.

Ingredients: Whey Protein Concentrate (Milk) (94%) (with Emulsifier: Lecithins), Flavourings, Colour (Beetroot Red), Thickener (Xanthan Gum), L-Leucine, Salt, Acid (Citric Acid), Sweetener (Sucralose).

Allergen advice: Contains milk.

Figures and ingredient lists reflect the manufacturer's published product information. Refer to the supplied packaging for the latest batch and flavour-specific details.
Suggested Use & Compatibility

Suggested Use

Mix one 30g scoop with 300ml cold water, shake and consume as part of your protein intake, often within 30–60 minutes following training.

Dietary Compatibility

Contains whey derived from milk. Check individual flavour ingredients and allergen details before use.
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.
Quantity Size: 15 Serve Pouch (450g)
Flavour: Vanilla

Shop by Collection

Best Sellers

Best Sellers

Bundles

Bundles

Offers

Offers