Women in child bearing years have the most problem with calcified stones and maybe when your 90 years old and lived 90 years with a clogged gallbladder will the entire thing turn rock hard.
Lecithin works for all,
Beet leaf juice works for all,
The epsom's salts liver flush works 100% everytime for all.....
So the odds are, your friend desires to keep his stones that same as 99+% of all humans desires to keep them. You an flush them your entire life and end up as insane as Dr. Hulda Clark and get no where other than full of epsom's salt. The simple solution is plant fats, because the lack of plant fats is the ONLY reason people have the common gallstones. Natural non animal Lecithin has been the medical cure for over 70 years.
Just my opinions of course, each person must read and discover what they desire to believe.