47% below avg
Applied Nutrition
Applied Nutrition Critical Mass Original – High Calorie Weight Gainer | 917 Calories | Informed-Sport Tested | 6kg
Mass Gainer6kg
Live · prices checked today
UK protein deals & discount codes.
The cheapest in-stock protein powders across UK retailers today, sorted by best value per 25g of protein, with discount codes applied.
New customer offersFirst order · refer-a-friend
Discount codes
MyproteinMYPCHECKOUTDetailsExtra 8% off (10% during 21-31 May)
Deal of the Day
52% below avgWhey ConcentrateBest Value Today
Naughty Boy Lifestyle - Naughty Boy Advanced Whey – 22g Protein | Lean Muscle Support | 2010g (67 Servings)Nutristore·2.01kg·5 flavours
£34.95
£1.74/100g£0.60/25g protein
You save £38.62 vs average market price
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Best Deal by Protein Type
Whey Concentrate52% below avg
Naughty Boy Lifestyle - Naughty Boy Advanced Whey – 22g Protein | Lean Muscle Support | 2010g (67 Servings)
Nutristore · 2.01kg
£34.95£0.60/25g
Whey Isolate79% below avg
Casein56% below avg
Mass Gainer47% below avg
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FAQ
Frequently asked questions
Where can I find protein powder deals in the UK?
WheyWise tracks prices across 85+ UK retailers every week and highlights products with the biggest price drops, active sales and live discount codes. This page shows the best current deals so you can find cheap protein powder without checking every site.
How do I use a protein powder discount code?
Copy the code shown next to the retailer name on this page, add your protein powder to the basket on the retailer's website, and paste the code at checkout. Codes are verified weekly but can expire without notice — if one does not work, check back for updated codes.
Do protein powder prices change often?
Yes. Retailers adjust prices regularly, especially around sales events like Black Friday, January sales and bank holidays. Prices also fluctuate based on stock levels and new product launches. We check prices weekly so you always see current deals.