you don't HAVE to do the SWF (Salt-Water-Flush) if you do the lax tea day and night. The P&B shakes are not part of the original Master-Cleanse but something some people add on to do something called the "Ultimate Cleanse." The P&B shakes are separate and apart from the SWF (Salt-Water-Flush) and lax tea and do not replace them.
I have done five MC's and never seen anything hideous come out of me except a little mucous.