Protein supplements differ from whole food protein sources primarily in their composition and nutrient density. Supplements, like whey or casein, offer concentrated protein with minimal added nutrients, while whole food sources such as chicken, fish, or beans provide protein along with essential vitamins, minerals, and fiber. Whole foods often promote satiety better than supplements, potentially aiding in weight management. However, supplements are convenient for quick protein intake post-workout. Each has its place, depending on individual dietary needs and lifestyle.