Rival Nutrition Promasil Casein is a premium, slow-digesting protein powder formulated from native micellar casein, ideal for supporting muscle recovery during extended periods without food, especially overnight. Crafted with a blend of native micellar casein, partially hydrolyzed casein, and alpha-lactalbumin, this product delivers up to 8 hours of amino acid release, making it one of the top rated nighttime protein supplements available. Its easy-mix formula contains little fat or sugar, ensuring a clean intake that’s safe for athletes and fitness enthusiasts alike.
Whether you’re seeking the best casein protein for muscle recovery or a reliable option for a night-time supplement, Rival Promasil provides a steady stream of nutrients to your muscles, helping you wake up feeling refreshed and ready to train. To maximize benefits, learn how to use this slow-digesting protein effectively—simply mix with water or milk and consume before bed for optimal results.
Charles Fisher (verified owner) –
I’ve been using Rival Promasil for a few weeks, and I love how it keeps me feeling full and supports muscle recovery overnight. Definitely the best casein protein for muscle recovery that I’ve tried.
Brian Hutchinson (verified owner) –
The taste is smooth, and it mixes instantly—perfect for my late-night routine. Great quality and a reliable, slow-digesting protein.
Kenneth Wallace (verified owner) –
Affordable and effective, this is my go-to for a cheap casein protein for athletes. It really helps me recover faster after intense workouts.