Works for me but can cause headaches.
I'm one of the people for whom the active ingredient Toothed Clubmoss and the derivative Huperzine A gives headaches to.<br /><br />However, I feel more alert and &#34;with it&#34; and can recall much more minute details when I take this, but after a couple hours when the headache kicks in my productivity drops off rapidly.
Rating: 3 stars