The liver flush is easy and safe if performed rightly and taking the necessary breaks.
On the contrary, my opinion is, that if the liver is full of stones, taking small portions of oil daily can force some stones out (as it happened to me). If there is not awareness of cleaning the colon afterwards these stones can remain too long in the body and cause trouble.
Once the liver is clean may be what MH suggests (taking lecithin or olive oil every day at night) will maintain the liver clean.
MH is lately suggesting that the liver flush can be unnecessary. I don't agree with that. For me the liver flush is one of the best things one can do for general health.
I have never tried lecithin, I avoid soja products, I don't know if it pushes stones or helps to dissolve them.