So I have been taking this for 4 days now and I can honestly say I definitely feel way alert and on my game just a few hours after i take this. Its like the missing piece to my puzzle! Lol I am usually the type that spaces out alot and I don't really absorb much of what I hear but when I take this, just a couple of hours later I feel like my brain is sharp as ever. Like you could tell me an entire story and I would remember every detail of it! :) id say if your debating on trying this it is DEFINITELY worth a try you wont regret it!