Casein is often touted as the best type of protein powder to have before bed, since it digests more slowly. You'll find it mostly in two forms: micellar casein.
For most physically active people, a daily protein intake of 1.2 to 2 g/kg/bw (0.54 to 0.9 g/lb/bw) is likely optimal. Moreover, high protein, low carb diets.