This site's fifth and final mechanism front is oxidative defense — worth understanding on its own as the formula's longer-term, protective front.
This site describes this front directly: antioxidant support helps shield brain cells and support long-term cognitive health — positioned as a protective, longer-horizon front distinct from the other four's more immediate focus.
Worth reading this front alongside the other four as this site's complete five-front picture — memory, focus, brain-cell health, mental energy and oxidative defense together, rather than any one front alone.