Casein protein powder is a slow-digesting protein that provides sustained energy over long periods. Optimum Nutrition Gold Standard Casein is often rated the best casein protein powder due to its high protein content and good taste. MyProtein Impact Whey Protein Blend Casein is also highly rated for its blend of casein and whey proteins and affordable price.

1. http://top10supplements.com/best-casein-protein-powders-on-
the-market/