"Flies consuming caffeine at night were less able to suppress movement, displaying impulsive behaviors such as reckless flying despite these aversive conditions,"
"Flies don't have human hormones like estrogen, suggesting that other genetic or physiological factors are driving the heightened sensitivity in females,"
Fruit flies consumed caffeine under varied doses, daytime versus nighttime exposure, and combined with sleep deprivation. Nighttime caffeine exposure reduced the flies' ability to suppress movement when subjected to an aversive strong airflow, indicating increased impulsivity and risky responses. Female flies exhibited markedly greater caffeine-induced impulsivity than males despite comparable body caffeine levels. The sex-specific sensitivity appears independent of human hormones like estrogen, implying genetic or physiological drivers. These results suggest that nighttime caffeine use can alter decision-related and motor suppression behaviors, with potential implications for people who use caffeine to stay alert at night.
Read at Daily Coffee News by Roast Magazine
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