The first day I used the product I felt incredibly alert and focused on my work. I was very impressed. Those effects seemed to diminish each day as the week went on though, as if there was a sort of tolerance at play.

amazing product!

first day I had a headache, second day no headache but i noticed I was calm. Each day after my 'sense' of calm seemed to last longer and longer into the day-well into the late afternoon early evening

Provides a very nice edge. Definitely a smooth and precise push. I like it, but must be careful with additional caffeine. If you are a coffee drinker, you might wish to reduce or eliminate coffee when taking. I add a bit of theanine with any additional coffee. But highly recommend you try Focus and find where it fits in your program. Nice product. Especially like how the taurine and tyrosine combine.