an alarm clock at dusk.

Coffee and Sleep: When Does Your Last Cup Really Matter?

AG Magazine • Health & Nutrition You’ve heard the rule a thousand times: no coffee after 2 p.m. It sounds airtight, until researchers ask tens of thousands of everyday drinkers how they actually sleep and the pattern refuses to cooperate. A 2026 PLOS ONE study of more than 25,000 Swedish adults found that habitual coffee …

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