Optimum Nutrition Gold Standard 100% Casein 908g (2lb) Benefits Pure micellar casein Superior source of protein Digests slowly to enhance muscle building upto 12 hours Best tasting casein around 24g of protein per scoop Predator Nutrition Gold Standard 100% Casein 2lb Review Optimum Nutrition's Gold Standard Whey is the undoubted leader when it comes to whey proteins & their Gold Standard Casein is the best when it comes to slow-digesting proteins designed to extend the period of time which nutrients are released across. This is important for the following reasons:1. For dieting, a slow release rate aids satition & so prevents hunger 2. At night, when you would otherwise not eat for 8-10 hours, using Gold Standard Casein means that you can feed your muscles nutrients while asleep Indeed, research has shown that providing casein at night is a superior strategy to providing whey protein & this fact, together with Gold Standard Casein's utilisation of the highest quality micellar casein, not to mention the fabulous taste, makes this product a winner in our book.