Wired Differently: Caffeine & Your Genetics

Wired Differently: Caffeine & Your Genetics

From My Verbal Journal: Let’s Chat by Maci Jones

April 29, 2026 · 33 min · Season 5 · Episode 6

About this episode

Maci Jones and guest Katie Harnan discuss how genetics affect caffeine metabolism and share personal updates.

Ever wondered why your friend can down four espresso shots and feel nothing while one cup of coffee sends your heart racing? This week, I am joined by Katie Harnan to break down the science of caffeine metabolism and why the universal "400mg of caffeine a day" recommendation doesn't work for everyone. Plus: life updates, graduation, playoff hockey, reality tv, & more ⁠⁠Personal IG: @macileejones⁠⁠⁠⁠⁠ ⁠⁠⁠⁠⁠Podcast IG: @myverbaljournal.letschat⁠⁠ ⁠⁠Katies IG: @katieharnen⁠

People in this episode

Host: Maci Jones

Guest: Katie Harnan

Topics covered

  • caffeine metabolism
  • genetics
  • personal updates
  • health recommendations
  • lifestyle

Keywords

  • caffeine
  • genetics
  • metabolism
  • health
  • espresso
  • coffee
  • lifestyle
  • reality TV

Mentioned in this episode

Organizations: My Verbal Journal, Instagram

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