Multi-source proteins blend two or more proteins in one scoop, usually whey concentrate, whey isolate, casein and egg. Many people pick them for a creamier, thicker shake than a straight isolate.
We carry Optimum Nutrition Gold Standard 100% Whey, BSN Syntha-6, PEScience Select, Dymatize Elite 100% Whey and blends from NutraBio and Inspired Nutraceuticals. See also whey isolate and casein.