What ingredient in this pre-workout makes me so focused?

I’ve noticed something weird this pre-workout doesn't just help me with workouts. Even on days when I don't exercise and take this preworkout, I’m way more productive and my ADHD symptoms are significantly reduced. The label suggests taking two scoops, but I only take half a scoop, which is a really small amount (I'm 5'1", 122 lbs).

I’m curious about what specific ingredient is giving me this boost. I’d love to find it on iHerb or somewhere else to buy it separately. Does anyone have any idea which ingredient could be responsible for the focus and productivity?