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: Casein eventually became a favorite in the "fitness foodie" world because of its unique texture. When blended with frozen fruit and a small amount of liquid, it whips into a voluminous, marshmallow-like "fluff" that became a social media sensation.

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: Initially, it was just a thicker alternative to whey, often used in shakes that felt creamier and more filling. : Casein eventually became a favorite in the