You can also break it with fresh vegetable and fruit juices, and than do the liver flush.
It is important that after the liver flush, you continue with simple foods like vegetable or fruit juices, yogurt, etc, for at least one day, if you break the Master-Cleanse with a liver flush.
It may also be smart to do an enema on the second day of liver flush, to make sure you eliminate all the crap out from your bowel.
When people feel bad after a liver flush, it is often caused by toxins released by liver, toxins that end in your intestines, and get re-absorbed into portal vein and blood.
Another good thing is to maybe use yogurt in the last enema water, to help your colon rebuild population of good bacteria.
Another reason some people experience bad reaction to Liver Flush is due to dysbiosis / dysbacteriosis.
Toxins dumped by liver may be residues of medications and synthetic hormones used many years ago, and those residue may wreck havoc on your colon microbiota, causing all sorts of long lasting symptoms.
Taking yogurt enema or even better, taking FMT can really prevent days, weeks or even months of suffering induced by crap dumped from the liver.
So, yogurt should be home made, possibly from raw milk, so it is natural and rich in many good bacteria.