Can you be any weight to take skinny fiber?

Hi I have done ALOT of research on skinny fiber and have found no bad reviews or nothing bad about it. Im 121 lbs (already thin). now i know im thin enough because im 5ft5 and 121 lbs but i have belly fat and its not just for weight lostbut for IBS wgich i suffer every single day from.. good for skin. migrains. and insomia... Im in day two and actully feel fatter :-:- but itsnormal to bloat so i hear... so my question will i lose 6lbs taking one a day and how long? and am i ok to take it as im not overweight. and will the effects wear off if i stop taking it?