What fantastic news.
Research has shown that a small amount of dark chocolate (just 50g) puts you in a better mood and increases brain power and memory. The chocolate used was 70% cacao and 30% organic sugar cane, a product marketed as a health food.
Just 30 minutes later, brain scans showed an increase of gamma waves in areas indicating:
Improved neural connectivity,
Improved mood, and
Boost of memory.
So if you want to get in the mood and have less stress and more memory, then eat very dark chocolate.