B vitamins are more important here, as they are required as cofactors for pretty much every metabolic step in and around the citric acid cycle (aka Krebs cycle,

B vitamins are more important here, as they are required as cofactors for pretty much every metabolic step in and around the citric acid cycle (aka Krebs cycle, responsible for cell respiration and energy generation), as well as a similar cofactor for steps in the human serotonin synthesis pathway.