Cheapest Animal Protein Powder UK

Animal-source protein powders — whey and casein — remain the gold standard for muscle building. Whey is fast-absorbing and ideal post-workout, while casein digests slowly and is popular before bed.

This page shows every animal-source protein powder we track across UK retailers. Whey concentrate is the most affordable option with 70-80% protein content. Whey isolate pushes that to 85-92% with less fat and lactose. Casein sits between the two on price but offers a completely different absorption profile.

All prices are checked weekly and ranked by cost per 25g of protein. Use the filters to compare by brand, bag size or specific protein type.