The CNP Flavonoids, Polyphenols, Carotenoids, and Mental Health Research Category highlights research exploring the effect of many phytochemicals, including polyphenols, carotenoids, and flavonoids, on the brain, psychological functioning, and mental health. To view each original study on the open Internet, click “Original.” To view the CNP-written abstract summary, click “CNP Summary.” While only some of the CNP-written abstract summaries are available below for free, all abstract summaries are available to CNP members through the CNP Library Membership.