My experience and a lot of people I know have had to kind of experiment with diff ones to know what works for you or what doesn’t work. A lot of them have mild side effects that may not agree with yr lifestyle. (drowsiness, headaches, weight changes, etc.) but once you find one that works, it usually is helpful in a gradual way. Like you don’t notice it instantly. Also don’t abruptly quit taking them bc some of them have nasty withdrawal symptoms