Many natural remedies aren't dangerous or harmful, unless your system is toxic. It is when they stimulate the body to elimate toxins, that you feel sick. Go slowly. Youu are in control of how fast you cleanse. Broccoli use to make me horribly ill. Once it got the worms out of my colon, I can eat it without getting gas. People would think I was nuts if I went around warning everyone to be careful about eating Broccoli. Herbs are food too. If they make you sick, it means something living in you and feeding off you to the detriment of your health and well being, is dying off. It is a good sign. I means they are working. Take less, increase when your die off symptoms have subsided.