Of course you are skeptical of what you find on this site....I would think you would, however, be somewhat reassured in that much of what is found on this site, with the exception of the Zapper, is actually herbal medicine that has been practiced for a 1000 years or so.
Also....the Liver Flush recommended by Dr. Clark is simply Olive-Oil and Epsome Salts....I would not be concerned about the FDA taking those products off the shelves any time soon.
As to the other herbal products recommended for parasites and such....just start a simple Colon Cleanse and parasite cleanse...give it several weeks....then do a liver cleanse...if you get no results....it cost you a total of about $30...about the same as the co-pay on two prescriptions that you would take in a second if the doctor recommended them....and how many times does the doctor say to give a certain prescription a try and come see him in 30 days to see the results?...in other words...the doctor is only taking an educated guess as to what is bothering you.