One of the quickest ways to increase blood flow to the brain is short, intense periods of exercise that last between 10 and 40 minutes, according to the Boston Globe. The media outlet explains that a study published in March 2013 in the British Medical Journal found that exercise improves brain function, likely due to increased blood flow. A short workout one hour before a vital task improves performance.
A study published in May 2014 by the British Psychological Society suggests that musical training increases blood flow to the left side of the brain. Patterns of brain activity were monitored in 14 musicians and nine non-musicians performing different tasks. The brains of the musicians remained the same throughout. However, the brains of the non-musicians changed when they participated in musical training tasks.
Dr. Barry Sears believes that the best way to improve blood flow to the brain and to every other part of the body is to increase the level of omega-3 fatty acids in the blood. These fatty acids produce a class of chemicals called eicosanoids that alter blood flow in the body.
In the elderly, WebMD states that beet juice increases blood flow in the brain. This vegetable may help reduce the effects of dementia in elderly patients. Britain's National Health Service reported on a small study that claimed cocoa improves blood flow in the brain of the elderly. Scientists are not sure how cocoa works, but they believe that some substance in the bean increases blood flow.