Hi
I have been researching Iso whey complete.
It is safe to use during B'fing.
You can check it all out for yourself on PharmaFoods - Homepage

You can get Iso whey at some chemists it can cost between $36 to $65
I found it for $36 on special at a chemist but there is a chemist on line that sells it for $39 all the time.
PM me if you want any more info....

Take care
Chris