BioTechUSA's Micellar Casein 2.27 Kg is an excellent source of slow-release protein, ideal for nighttime nutrition and muscle preservation. Casein, the main protein in milk, is characterized by its slow digestion, forming micelles that ensure the prolonged release of amino acids into the bloodstream over periods of 7 to 8 hours. This makes it an optimal choice for those looking to strengthen their musculature during sleep, thus preventing muscle catabolism.