Delicious Strawberry Flavor Mixes Instantly! Premium Cold Micro and Ultra Filtration. Protein Supplement. Naturally and Artificially Flavored. Ultimate Nutrition's ProStar Whey contains only naturally occurring amino acids from 100% premium whey protein. Ultimate Nutrition's ProStar Whey contains all the whey protein fractions such as Beta Lactoglobulin, Alpha Lactalbumin, Glycomacropeptide, Immunoglobulins, Proteose Peptones, Serum Albumin, Lactoferrin and Lactoperoxidase. Ultimate Nutrition's ProStar Whey is isolated by a complex low temperature processing system that utilizes a proprietary micro and ultrafiltration process for the highest quality premium isolated whey protein available.