"FitLine Basic PLUS"

I would like to know which is the best cleansing stuff for chronic constipation. Fasting on vegetable juice or distilled water have not resolve my problem. I read on this web site that "FitLine Basic PLUS" is a very potent product and I would like to know more and give it a try. Also I'm living in Quebec, Canada and I would like to know where I can find this natural product. Thanks everyone for your cooporation.