don't mess with this shit. just be healthy and eat the right shit, sleep right, stop drinking/smoking. redline can kill you if not in a short amount of time it will definitely be in the long run of things. i once fucked with redline and i hated it, it's addicting and feels great. but it is terrible on your organs. if you need energy, drink super food from odwalla and have a healthy diet. super food is less expensive than a four pack of redline and is completely great for you. it is also more in it's container than all four combined.
here's another review from someone else if you want:
http://www.bandddesigns.com/energy/arch/002853.php