It's delish, it makes you feel good and now eating dark chocolate is also being credited with helping your eyesight.
But before you crack open the family-size block, US researchers caution the improvement in visual clarity is only slight.
The consumption of dark chocolate high in cacao flavanols - a powerful antioxidant - is linked to short-term improvement in blood flow, mood, and cognition.
Participants were randomly given either a 40 gram dark chocolate bar containing 72 per cent cacao or a milk chocolate bar to eat.
They were then required to sit a vision test approximately 1.75 hours after ingestion.
Among the 30 participants, nine men and 21 women of an average age of 26, small-letter contrast sensitivity was significantly higher after consumption of dark chocolate compared to milk chocolate.
"Contrast sensitivity and visual acuity were significantly higher two hours after consumption of a dark chocolate bar compared with a milk chocolate bar, but the duration of these effects and their influence in real-world performance await further testing," the authors wrote.