"i used the kira brand of st. john&#039;s wort because it was one of the ones used in the clinical trials done in europe. while i feel this is a good brand of st. john&#039;s wort, i had side effects from it which prevented me from continuing on it. i had diarrhea, gas and abdominal pain. i was unable to continue on the medication. while i was on it, i did not see any improvement, but i was not on it long enough. also, i should note that i was only on 300 mg and got this side effect. perhaps i am very sensitive."