So I am by no means an expert, just another jackass who has Experimented with a lot of nootropics (and other supplements). But my theory is with herbal supplements to only do one at a time. My thinking is while there may be evidence as to how X, Y, and Z work, where are the studies to say how they might interact with each other?
Other supplements Like alcar and various choline products don’t apply to my admittedly unproven theory.