Great alternative to caffeine

I've been taking this Focus squared brand supplement for a couple of days now, and I can really feel a difference. I used to drink energy drinks and take caffeine supplements all day long in order to stay focused and stay awake. After taking this brand I have greatly reduce the amount of energy drinks that I drink. You don't feel jittery or shaky from using these, I have use them to stay focus on my homework and to stay on task at work.