The most refined protein ingredients, pushed to ninety percent protein or higher with fat, carbohydrate, and fiber largely stripped away. Soy, pea, whey, and milk isolates deliver dense nutrition with clean flavor and strong gelling, emulsifying, and water-binding functionality, suiting infant formulas, sports nutrition, beverages, and meat analogues. Their neutral profiles and fine particle size also make them bases for edible films. Because isolation concentrates both nutrients and any allergens present, sourcing, processing controls, and accurate labeling are essential to their safe use.