
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
More episodes of My Verbal Journal: Let’s Chat
- Birth Control, Broken Cycles, & What Your Doctor Isn't Telling You · May 27, 2026 · 1h 13m
- Figuring S*** Out As We Go · May 13, 2026 · 57 min
- Masters Student By Day, Instructor By Dawn · April 13, 2026 · 1h 12m
- Feeling Behind? Let's Chat About It · March 25, 2026 · 20 min
- Everything You Need To Know About GLP-1's · February 25, 2026 · 36 min
- Fueling Properly in a World Obsessed with Being Smaller · February 11, 2026 · 31 min
Explore listener stats, chart rankings, contacts and more on the My Verbal Journal: Let’s Chat podcast page.