That's why, despite it being small, a new study conducted by researchers at the University of Alabama that evaluated the effects of caffeine intake on pain tolerance is so incredibly relevant. Published in Psychopharmacology, the researchers asked 62 men and women to record their daily caffeine intake—including coffee, tea, soda, energy drinks, and anything caffeine-containing. After one week, they conducted pain tolerance tests on the participants (using a device that gradually increased heat or pressure).
Interestingly, the results showed that the more caffeine a participant had consumed, the more tolerant they were to pain. The participants' average caffeine intake equated to about two cups of coffee
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