4 min read
Key Points
A new study found that 300 mg of caffeine had no effect on participants’ cognitive performance.
While past studies have found caffeine to be helpful, other issues like participants’ chronobiology, habitual caffeine intake, and other confounding factors may have been at play.
Experts explain why chronobiology may sway the results.
Every day, millions of Americans have a cup of coffee—or tea, or matcha, or other caffeinated beverage—to jump-start their day. And many believe it makes a big difference, whether they need physical energy to perform manual labor or the sustained focus necessary for a desk job.
But while experts…
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