Let’s talk supplements. The shiny tubs at the store, the ads with shredded models, the promises that sound suspiciously like late-night infomercials—“Gain 10 pounds of muscle in 10 days!” (sure, buddy).

Here’s the truth: Most supplements are basically expensive pee. You swallow them, your body says “thanks but no thanks,” and then you… donate them to the porcelain gods. But every so often, there’s one that actually earns its reputation. Enter: creatine.

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