Degenerative brain disorders like Parkinson's and Alzheimer's are thought to be caused, in part, by oxidative stress.
Tart cherries and their juice contain large amounts of antioxidants and other beneficial plant compounds that may have protective effects on brain cells (23).
In one study, consuming 16 ounces (480 ml) of tart cherry juice daily improved antioxidant defenses in healthy older men and women (24).
In another study, older adults with mild-to-moderate dementia consumed either 6.5 ounces (200 ml) of tart cherry juice or a placebo for 12 weeks.
Adults in the cherry juice group experienced improvements in verbal fluency and short-term and long-term memory, whereas those in the placebo group experienced no improvements (25).