The whey protein in Nutrisport 90+ Protein is absorbed quickly, having a very high biological value and an anabolic effect that lasts a couple of hours. The Micellar Casein in 90+ Protein is absorbed much more slowly, giving a sustained anti-catabolic action. It has therefore been recommended to take Whey Protein Isolate in the morning and Micellar Casein but not any denatured casein last thing at night. So Nutrisport 90+ provides the best of both for muscle growth at any time of the day or night. Calorie Free sweetener (aspartame free), Low in fat and carbohydrate, Supports muscle growth/reduces muscle breakdown, High BV Whey Protein Isolate, Slow Digest Micellar Casein, Quick but prolonged release of amino acids to muscles, Highest Protein Percentage of any Protein in it\'s class. Gluten free,