Participants who ate a dark chocolate bar experienced improved contrast sensitivity and visual acuity 2 hours after eating the candy compared with participants who ate a milk chocolate bar, according to a study.
The randomized, single-masked crossover clinical study included 30 participants randomly assigned to consume either a milk chocolate bar or a dark chocolate bar. The participants were evaluated within 2 hours after consumption, and the researchers measured visual acuity and large- and small-letter contrast sensitivity.
After consumption, large-letter contrast was slightly higher in the
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