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

Recovery without the extra carbs — SiS REGO Whey delivers up to 22g of protein and essential amino acids to help repair, rebuild and recover after every workout.

Quantity Size: 15 Serve Pouch (450g)
Flavour: Vanilla
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Key Benefits

  • 22g Whey Protein Per Serving – Provides high-quality protein to support muscle growth, maintenance and recovery after exercise.

  • Complete Amino Acid Profile – Contains all nine essential amino acids, including BCAAs such as leucine.

  • Designed for Shorter Sessions – Ideal after gym workouts, strength training, shorter runs and moderate cycling sessions.

  • Low-Carbohydrate Formula – A protein-focused alternative to higher-carbohydrate recovery drinks.

  • Added B Vitamins – Includes Vitamins B1, B2 and B6 to support normal energy and protein metabolism.

  • Easy to Prepare – Mix one 30g scoop with 300ml of cold water.

  • Convenient Recovery Nutrition – An easy way to increase daily protein intake and support post-workout nutrition.

  • Flexible Size Options – Available in 450g and 1.35kg pouches, with Chocolate, Strawberry and Vanilla flavours.

  • Informed Sport Certified – Batch-tested for substances banned in sport.

The SiS REGO Whey Recovery Protein is a premium post-workout protein powder designed to support muscle recovery, growth and maintenance after exercise. Ideal for runners, cyclists, gym-goers and endurance athletes, it delivers up to 22g of high-quality whey protein per serving, making it a convenient recovery shake after shorter training sessions, strength workouts and everyday exercise.

Formulated with a complete amino acid profile, including all nine essential amino acids and naturally occurring BCAAs, SiS REGO Whey provides the protein your muscles need after training. Unlike high-carbohydrate recovery drinks designed for prolonged endurance exercise, its protein-focused formula is particularly suited to shorter or less demanding sessions when extensive carbohydrate replenishment may not be necessary. Added Vitamins B1, B2 and B6 also support normal energy and protein metabolism.

Simply mix one 30g scoop with 300ml of cold water, shake well and consume within 30–60 minutes after exercise. Available in 450g and 1.35kg pouches, with Chocolate, Strawberry and Vanilla flavours, SiS REGO Whey Recovery is a practical addition to any training routine, helping you maintain a consistent protein intake and prepare for your next workout.
Product Specifications

Product: SiS REGO Whey Recovery Protein

Product Type: Post-workout whey protein recovery powder

Format: Powder pouch

Available Sizes: 450g (15 servings) and 1.35kg (45 servings)

Serving Size: 30g / 1 scoop

Mixing Instructions: Mix 30g with 300ml of cold water and shake well

Calories Per Serving: 117 kcal

Protein Per Serving: 21–22g, depending on flavour

Protein Source: Whey protein

Carbohydrate Per Serving: 2.4g

Sugars Per Serving: 1.4g

Fat Per Serving: 2.1g

Saturates Per Serving: 1.3g

Salt Per Serving: 0.25g

Sodium Per Serving: 100mg

Leucine Per Serving: 2.8g

Amino Acid Profile: Contains all nine essential amino acids, including BCAAs

Added Vitamins: Vitamins B1, B2 and B6

Primary Use: Muscle growth, maintenance and post-exercise recovery

Recommended Use: Consume within 30–60 minutes after exercise

Best For: Strength training, gym workouts, shorter runs, cycling and moderate-intensity exercise

Available Flavours: Chocolate, Strawberry and Vanilla

Certification: Informed Sport certified

Key Features: High-quality whey protein, complete amino acid profile, low-carbohydrate formula and convenient post-workout recovery.
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

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