for it... after taking colosan for 5 days my natural urge to poop disappeared, and it took 8 months of herbal laxatives (fiber based). then finally that really stopped working for me and i spent $400 working with Kam Yuen, doing chinese medicine to get my urge to poop back. i'm happy to say everything is working very well now.
i don't believe that every product works well for everyone. i also don't believe that a product can screw up someone that didn't have a hint of a predisposition for a particular problem.