"the first day i took this i immediately got a mild headache, this headache lasted the whole time i took it. i have been on it for a week and stopped today. my heart beats hard, i have headaches, acid reflux, body aches, and weight gain. i am thinking maybe it raises my bp instead of lowering it and causing me to hold water. i have been the same weight on an extremely low carb diet which is not normal for me. works for many, but not me."