Walk into any store, and you'll see protein bars, powders, and even protein popcorn. Social media is flooded with high-protein diet tips promising muscle gain and weight loss [1]. But is this just hype for "Gym Bros"? The science tells a different story. Protein is *crucial*, but maybe not for who you think. It’s a key player in healthy aging, fighting sarcopenia [3, 4], and even supporting modern weight-loss journeys [1, 2]. Let's separate the facts from the fad.