Nutritional information may vary depending on flavour. We’re making it easier than ever to find the products you need, whatever your goal. That’s why we’ve changed Micellar Casein to Slow-Release Casein, but don’t worry, we’ve not changed the taste or the nutritionals, so it’s still your favourite milk protein supplement. What is Slow-Release Casein? Slow-Release Casein is our highly popular milk protein powder, designed to be slow absorbing to provide a sustained supply of protein between meals and even while you sleep. This makes it the perfect choice for bedtime protein shakes, helping you to wake up raring to go, ready for your next session. It also includes a complete amino acid profile for a well-rounded formula.