This site's third mechanism front concerns brain-cell health — worth understanding on its own, distinct from the memory and focus fronts.
This site describes this front directly: provides nutrients that support neurotransmitter function and neural communication — a cellular-level front, distinct from the outcome-level memory and focus fronts.
Phosphatidylserine is the ingredient this site most directly connects to brain-cell membrane structure, per its own ingredient breakdown — worth reading its standalone mechanism guide for more detail.