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The R1 Casein by Rule 1 is ideal if you want a long-lasting supply of protein. One of the ingredients is micellar casein, which has a lower digestibility than other proteins. This means that the body absorption takes place over a long period of time and you'll be noticeably measured longer. It is also beneficial to consume proteins for a longer period of time. One serving will give you 25 g of protein, only 1 g of fat and 3 g of carbohydrates. In addition, R1 Casein contains essential minerals such as calcium and iron. It is ideal for endurance or strength athletes who are in the construction phase.