There is plenty of research linking dark chocolate to overall heart health and immunity. However, a recent study from the University of the Incarnate Word in San Antonia, Texas is now finding that dark chocolate may have an effect on vision quality as well.

The researchers assessed 30 healthy adults in their 20’s. The participants were to either consume 1.5 oz of dark chocolate or rice milk chocolate. Labels were removed from the bars as to not skew any of the collected information. An hour after consumption, the subjects participated in a letter-based eye chart to test for visual acuity. The researchers concluded that those who consumed dark chocolate did experience slightly better vision, however, the effects, “were small and the real life functional relevance is unclear.” 

The reason for this slight visual improvement in the dark chocolate subjects, “may be a result of increased blood flow to the retina, visual pathways, or the brain’s cerebral cortex.” This increased blood flow would increase bioavailability of oxygen and nutrients to the cerebral cortex, allowing it to function properly and efficiently. It was  concluded that, “a single dose of dark chocolate improves visibility of small, low-contrast targets within 2 hours compared with milk chocolate, but the duration of this difference and clinical relevance remains uncertain.” While it is too early for dark chocolate to be recommended by your optometrist, introducing small amounts into your diet may show some positive benefits.

To learn more about dark chocolate and its effects on visual health, visit A bit of dark chocolate might sweeten your vision.

Try out this recipe, Dark Chocolate Covered Grapes, for an easy and delicious summer treat!