I'm not too sure that %age is correct...Most ph/ps you find today are 17aa which allows them to pass through your liver w/o complete destruction...this is also why 17aa are so liver toxic because as it continues to pass through your liver and does not get destroyed your liver will produce more and more chemicals to try and break it down all to no avail...all these chemicals that are produced only wind up 'destroying' your liver and not the phOriginally Posted by Rip it