Purium Supplements

Purium is a pretty popular product in our area. I've drank the shakes and my SO has done the fasting etc but I'm curious if anyone knows if these things are more of a placebo or if they actually are nutritious? I'm well aware that getting your nutrients directly from food sources will always be the best but are these products actually beneficial? I can't seem to find any doctor or nurse information that isn't by a purium founder or someone that sells it and can "personally attest to it". Anyone have any information on it outside of those sources?