This site's own mechanism sequence lists this specific third step — worth understanding it on its own.
This site describes it directly: Vitamin B6 is positioned to regulate oil production, particularly in the T-zone — the single-ingredient step tied specifically to B6 in this site's own sequence.
This site separately lists "Balanced, shine-controlled skin" among its eight stated benefits, tied to this same mechanism step — worth reading both together as this site's consistent B6-specific framing.