Please don't get into a mode of thinking that I need evidence for everything. It is free, try it yourself and see it works, if it doing any good for YOU, then it's just immaterial if it was never proved or not worked for anyone else (coz everyone is different, something works for you may not work for them)

I'm saying this with first hand experience, I was skeptical (I think lazy is better word), but I started recently, been on four weeks now and it is working for me, never going back.