Mrs Chang from www.sensiblehealth.com says we should not use Epsom Salt unless it is necessary as she understands E.S is harmful for the kidneys and causes some problems to the health.
I actually have been using Epsom Salt but just one tablespoon b4 I take the Oil+juice and that is all. Even this small amount is not recommended by Mrs Chang.
that is all all know and my experience as well.
Hulda Clark s recipe uses a lot of Epsom Salt which seems to be unnecessary as I have done many flushes without any Epsom Salt and they were successful.