Whey continues to gather support, especially for seniors, especially for senior women, as more abandon carb restriction in favor of High Protein Diets, e.g. Dr Layman, Dr Lyon, Dr Eenfeldt and the DietDoctor team. The leftover liquid of curdled milk is no different than butter, "processed" by an ancient method of inoculating milk with bacteria or separating fats. Adding whey protein to FF yogurt is like reconstituting the milk, minus the fat. High satiety, high nutrient density, no cravings.