Casein is the slower-digesting milk protein, which is why many people take it before bed or between meals. Micellar casein also mixes thicker than whey, so it works well in puddings and protein fluff.
We carry Optimum Nutrition Gold Standard 100% Casein, Dymatize Elite Casein, NutraBio Micellar Casein and PEScience Select, a whey and casein blend. See also whey protein and multi-source blends.