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Why does caffeine affect some more than others?

Sep 17, 2026 · 9m

Summary

Andrea Gilligan explores why coffee affects individuals differently, discussing caffeine’s half-life and its impact on sleep and pregnancy with registered dietitian Orla Walsh. They highlight significant inconsistencies in caffeine content across coffee shops and the high consumption rates in Ireland, where double-shot drinks are the industry standard. Oliver from Wall and Qo Teas contrasts this with Mediterranean habits, noting that Irish coffee culture is heavily ritualized. The episode concludes with advice to monitor personal tolerance, as factors like hormones, stress, and age can alte…

Topics discussed

Introduction and coffee consumption habits Guest introduction: Orla Walsh, registered dietitian Caffeine half-life and how long it stays in the body Historical vs modern coffee consumption Variability in caffeine content across coffee shops Inconsistency of caffeine in different cafes Advice for pregnant women and decaf options Impact of caffeine on sleep quality Caffeine and insomnia or waking up tired Caffeine content in tea vs coffee The psychology of coffee addiction and perceived benefits Health benefits of coffee beyond caffeine Finding your personal caffeine tolerance Introduction of Oliver from Wall and Qo Teas Morning coffee rituals and double shots in Ireland Comparison of Irish vs Mediterranean coffee culture Debate on single vs double shots and cultural norms Individual variation in caffeine tolerance Coffee as a cultural ritual and American influence History of coffee adoption in Ireland Listener comments on age and caffeine needs ADHD and unexpected reactions to coffee Caffeine in energy drinks and colas Factors changing caffeine tolerance over time Closing advice and guest sign-off
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