Dark Chocolate high in flavanols similar to the bioflavaniods in fruits and expecially grapes can increase blood flow in the brain by increasing more Nitric Oxide.
Source: Neuropsychiatric Disease and Treatment.
Volume 4, Pages 433-440
“Cerebral blood flow response to flavanol-rich cocoa in healthy elderly humans”
Authors: F.A. Sorond, L.A. Lipsitz, N.K. Hollenberg, N.D.L. Fisher
“We show that two weeks of regular Flavanol Rich Chocolate intake, providing 900 mg of cocoa flavanols daily, resulted in a significant increase in peak cerebral blood flow response in the middle cerebral artery.”
