Cheapest Casein Protein UK

Casein is a slow-digesting protein derived from milk, making it ideal for overnight recovery or as a between-meals protein source. It forms a gel in the stomach, providing a sustained release of amino acids over several hours — which is why many athletes take it before bed.

Compare every casein protein product available from UK retailers below, sorted by price per 100g. Casein typically costs more than whey concentrate but serves a different purpose in your nutrition plan.

If you are looking for a fast-absorbing post-workout option instead, whey concentrate or whey isolate would be more appropriate. For a plant-based slow-release alternative, look for casein-like blends in our vegan section.