Got 2 caps from a client back in 03 to try thinking it'd be like ephedrine for pre workout... Took it at about 2-3pm, anticipating it kicking in around 4 to train... 4pm comes and goes, nothing.. 5pm nothing.. 6pm train anyways, with no ripped fuel just in case it actually kicked in.. Nothing... Zero appetite and zero "stimulation", however I was laying in bed all night, wide awake till 7am. Exhausted all day the next day.
I've had clients who've used it for years straight however. Usually ladies 50+ who were impossible to work with diet-wise who couldn't understand thyroid down-regulation and thought 2 salads a day would "work", despite making no progress in years.