Protein Fusion is a great choice for individuals looking for a sustained release protein supplement that will be more substantial i.e. more filling). Unlike some of our competitors’ products, Protein Fusion is not simply a whey protein concentrate with a sprinkling of other proteins. Protein Fusion starts with a generous amount of the highest bio-available protein on the market: our Power Whey Isolate. Then, we add our special combination of sustained release proteins, consisting of Instantized Calcium Caseinate, Milk Protein Isolate, and Micellar Casein. We round out our stack with our cross flow microfiltered and ultrafiltered whey protein concentrate found in our exceptionally popular product, Power Whey Complex.