I have talked with several thousand people who have done Liver Flushes and other cleanses as well. With over 90 percent reporting positive benefit, I know better. From every thing that I have seen, the only ones who are against the Liver Flush are folks who have not tried it, the doctors who lose money, and the drug companies that lose money when people succeed in improving their own health.
As a note on statistics: Someone who has bad results is more than 20 times as likely to post something in comparison to someone with good results. Even with that statistic, there are very few complaints from those who have done flushes and cleanses.