SIS REGO Whey Protein | Fast Recovery Whey

SIS Rego Whey (450g/1.35kg)

SIS Rego Whey - 450g / Chocolate

£25.00

22g of fast-digesting whey protein with 2.8g leucine and all nine essential amino acids per serving, Informed Sport certified, selected by the PEAK4 expert team for shorter, high-intensity sessions.

£25.00

Size SIS Rego Whey - 450g SIS Rego Whey - 1.35g

Flavour Chocolate Vanilla Strawberry

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PEAK4 Experts' Review

The PEAK4 expert team selected SIS REGO Whey for its focus on fast-digesting protein without unnecessary carbohydrate, ideal for shorter, high-intensity training.

Details

Brand SIS

Mix one 30g serving with water and consume within 30-60 minutes after exercise for maximum recovery benefit.

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

Contains Milk.

Informed Sport Certified

Key Benefits

22g Whey Protein

Fast-digesting, complete protein per serving.

22g protein

2.8g Leucine

All nine essential amino acids, with leucine dosed for protein synthesis.

2.8g leucine

Low Carb Formula

Built for sessions that need protein, not a large carbohydrate hit.

Low carb

Informed Sport Certified

Tested and certified for competing athletes.

Informed Sport

B-Vitamin Support

Includes Vitamins B1, B2 and B6 alongside the protein blend.

B1, B2, B6

Two Pack Sizes

Available in 450g and 1.35kg pouches to match training volume.

450g & 1.35kg

Science in Sport (SIS)

The PEAK4 expert team selects SIS for its Informed Sport Site and Product Certification, the only sports nutrition brand globally to hold both, backed by the full PEAK4 performance ecosystem and free UK delivery over £50.

Dual Informed Sport certified

SIS REGO Whey Protein: 22g Whey, 2.8g Leucine, Informed Sport Certified
The PEAK4 expert team selected SIS REGO Whey Protein for shorter, high-intensity sessions where large amounts of carbohydrate aren't needed, but muscle still requires fast-digesting, complete protein.

Each 30g serving delivers 22g of whey protein concentrate, including 2.8g of L-Leucine and all nine essential amino acids, alongside Vitamins B1, B2, and B6, in a low-carb formula.

Whey is the fastest-digesting complete protein available, making it especially effective when consumed within the 30-60 minute post-exercise recovery window.