wow that is weird, i was wondering this a while ago. im always the happiest upbeat kid, haha, but about a month ago i was on low carb diet and also e/c stack for 6 weeks then xenadrine for 4, i felt like bored and miserable all the time, it was a feeling of like each day was just boring smae thing nothing interesting, about 2 weeks off of low carb diet and the supps and i feel like what was wrong with me then, haha, i dontknow if it was the low carb or the e/c or xenadrine, wierd stuff i dotn think im gonna take any of them agin.