i didn't think this was actually going to work either but i picked up this stuff and like i said i had a 5 day cold which is probably unheard of...for me anyway. i don't think i changed any of my daily routines. i slept the same amount, i worked, went to school...the whole 9 yards. i usually have a cold for at least aweek and with worse symptoms. i don't know...i haven't experienced any problems with it yet so i'm going to continue using it when i start feeling ill.