I have been taking these vitamins for a couple of days now, and the results are amazing. On the first day I took one pill in the morning and took two in the afternoon. An hour after I took the first pill I could feel the effects, it felt like caffeine but without the jittery shakes. I was able to Super focus on my tasks at work and I was able to plan my day accordingly. Before this it was difficult for me to stay focused and keep my tasks in line. I would definitely suggest this to any students or business owner would like to stay focused. I think you would also be great for teenagers or children with ADD / ADHD.