most people judge a "fat burner " by its side effects- its stimulatory ones typically... give it time and see how the results compare.. (and with respect to dosing tolerance varies quite a bit.. there are quite a few hardcore EC junkies that can only take 2-3 a day... and there are some that cannot tolerate EC and can take 6 thermorexin... individual variations)
stimulatory effect will vary.. though with cold.. both it and the dehydration that often accompany such.. it may mute stim effect