Caffeine Tolerance Might Be Genetic

Scientists have identified a gene that metabolizes caffeine at a particular rate within each person, which could explain why different people drink different amounts of caffeine to wake up. What do you think?

“I’ve always known I come from a three-venti-caramel-macchiatos-a-day bloodline.”

Justine Weiner • Systems Analyst


“It’s incredibly useful to have another thing to blame on my parents.”

Devin Showalter • Aloe Extractor

“Then how come I drink a whole pot of coffee every day, but my 5-year-old can barely finish his morning cup?”

Art Hess • Unemployed

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