Fast Metabolizer or Slow Sipper? Your Genes Might Be Deciding How Your Coffee Treats You
That identical cold brew can make one friend laser-focused and leave another wired, anxious, and staring at the ceiling at 1 a.m. The difference often comes down to a single gene — and once you know which camp you're in, your coffee timing, workout prep, and sleep hygiene all get a whole lot smarter.