To maintain lean mass, including muscle, sufficient amounts of protein are needed. Uckele's protein shakes are processed at low temperatures to ensure easy digestion and rapid absorption. A highly nutritious, proprietary blend containing Whey Protein Isolate (WPI), found in milk, is cross-flow and micro-filtered through membranes, leaving it virtually fat and lactose free. WPI has been shown to rapidly raise blood amino acid levels critical for muscle building and tissue repair.