Researchers have confirmed it. Your morning cup of joe gives you a morning mood bump.

Caffeine drinkers told researchers from the University of Warwick and Bielefeld University in Germany that a cup of coffee or tea boosted their mood during the first 2.5 hours of the day, but it wasn’t sustained toward later in the day.

Their findings were published in Nature Scientific Report .

The researchers tracked the mood of more than two hundred young adults for up to four weeks each, compiling 28,000 mood reports.

Rather than sit in laboratories, where past studies of this type have been undertaken, this study’s subjects received prompts on their phones while going about the day. The prompts arrived seven times a day, asking if they had recently consumed caffeine and how they felt in the m

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