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Drinking decaffeinated coffee could improve memory function more effectively than regular caffeinated coffee, according to a pilot study by researchers at University College Cork in Ireland.
Scientists tracked 31 participants who regularly consumed three to five cups of coffee daily, asking them to refrain from drinking coffee for two weeks.
Following the two-week pause, half of the group resumed drinking regular coffee while the remaining participants switched to decaffeinated coffee.
Reintroducing coffee led to reduced stress levels and lower impulsivity across all 31 participants, while the caffeinated group experienced improvements in anxiety and attention span.
However, during memory testing, participants drinking decaffeinated coffee performed significantly better on recall tasks involving words and locations.
Researchers hypothesise that gut microbiome interactions may account for the difference, though they stressed that larger clinical trials are required to confirm the findings.
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