Casein protein is made from milk. Casein protein is removed from the milk via filtration; this increases the milk peptides. The reason Casein is so popular is because it is a super-slow digesting protein, unlike whey that can be digested in a few hours.

It is a slow digesting protein because it turns into a paste in the gut, resulting in a long slow release of amino acids. Studies have shown your body will be at its peak absorption of these amino acids 3 – 4 hours after consumption with total digestion not completing till as long as 7 hours after consumption.

Compare this with Whey protein – Whey protein hits peak absorption 1 – 1.5 hours after consumption with full digestion only 2 hours after consumption.

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