Epsom Salt Solution
Epsom Salt is a natural mineral compound, that when ingested works as a laxative. The purpose of it is to free your gut for the gallstones elimination.
To prepare one cup of the Epsom Salt Solution you need a cup of 400ml (14oz) of water and 1 tablespoon (15 grams) or Epsom Salt. The water needs to be warm, so that the salt can dissolve better.

When drinking the solution you need to go sip by sip. If you feel any disconfort you can also ingest apple juice or the apple vinegar solution.
The Epsom Salt also goes by the scientific name of Magnesium Sulfate, and can be found in pharmacies. They're usually sold in a pack with small separate portions that are ready to use for this solution.