The role of malic acid in modifying bile is the only aspect of liver-flushing that hasn't been confirmed by medical experimentation. Dr. William Kelley is the author of "One Answer to Cancer" 1967 mention the benefits of malic acid in his book but doesn't explain how this works. He states that: "Apple juice (high in malic acid) or ortho-phosphoric acid, which acts as a solvent in the bile to weaken adhesions between solid globules." This statement appears to be the first reference to connect malic acid to cholesterol and has been perpetuated by his contemporaries.
It is known through rigorous medical experimentation and trials that the soluble fibre pectin reduces cholesterol levels and thins bile. Both pectin and malic acid acid are found in apples but pectin isn't abundant in sour cherry.
You will have to make your own conclusion.
Thank you for enquiring about my gallbladder, which is in very good health after finally expelling the biliary sludge using a modified protocol.