
Gastropod Caffeine: The World’s Most Popular Drug
19 snips
Mar 21, 2016 Harold McGee, food science expert who explains caffeine chemistry and extraction, and Murray Carpenter, journalist who maps caffeine’s cultural and historical role. They discuss why plants make caffeine, caffeine’s timing and metabolism, surprising effects like interactions with birth control, and how drink type and brewing change caffeine levels.
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Coffeehouses Fueled The Age Of Reason
- Coffeehouses helped fuel Enlightenment culture by concentrating caffeinated, alert people who exchanged ideas.
- Harold McGee and Bennett Weinberg link coffeehouse conversations to institutions like the Royal Society and early insurance markets.
Caffeine Gives Athletes A Measurable Edge
- Caffeine boosts athletic performance by 1–3% and may increase muscular force per contraction.
- Murray Carpenter cites lab tests where caffeine increased electrically induced muscle contraction strength, possibly via calcium availability.
Tolerance Comes From New Adenosine Receptors
- Habitual caffeine use produces partial tolerance as the brain upregulates adenosine receptors.
- Murray Carpenter and Harold McGee explain withdrawal feels flu-like but tolerance resets after ~1–2 weeks of abstinence.






