Much to the delight of choco-holics everywhere, researchers continue to investigate the potential health benefits of the tasty elixir of the cocoa bean. The dark chocolate health benefits are thought to originate with flavanols – potent antioxidant compounds – found naturally in significant concentrations in the cocoa bean. The latest research, published in the current issue of JAMA Ophthalmology, compared the impact on visual acuity and contrast sensitivity of both milk chocolate and dark chocolate.
But – if you like chocolate as much as we like chocolate – you’ll want specifics:
- Dark chocolate was represented by a 47 g 72% Cacao Dark Chocolate bar (containing 34 g of cacao with a total flavanols amount of 316.3 mg)
- Milk chocolate was represented by a 40 g Crispy Rice Milk Chocolate bar (containing 12.4 g of milk chocolate cocoa with a total flavanols amount of 40 mg [8 times less than dark chocolate bar])
Both chocolate bars were from Trader Joe’s, so they are commercially available!
Thirty fortunate adults participated in the study that required them to eat chocolate and then have their vision checked within 2 hours. Dark chocolate contains higher amounts of flavanol compounds and the study showed dark chocolate conferred more benefits than milk chocolate. Specifically, those who ate dark chocolate before having their vision evaluated:
- Had significantly higher small-letter contrast sensitivity than those who consumed the milk chocolate bar
- Had higher large-letter contrast sensitivity measurements, but not significantly more than the milk chocolate cohort
- Had slight improvement in high-contrast visual acuity and standard visual acuity over those who had milk chocolate
The study authors could not assign a specific cause for the vision improvements observed among those who ate dark chocolate, nor did the study measure how long the visual improvements lasted. So, the good news is, more study into dark chocolate health benefits is needed!