I really have nothing more to add, except that the FDA has a hard time tracking these down because of a self imposed rule that it is the FDA that has to prove that the supplements are potentially harmful, and there's really no way of preventing companies to market supplements that are not effective.
From http://vm.cfsan.fda.gov/~dms/ds-oview.html :
"By law (DSHEA), the manufacturer is responsible for ensuring that its dietary supplement products are safe before they are marketed. Unlike drug products that must be proven safe and effective for their intended use before marketing, there are no provisions in the law for FDA to "approve" dietary supplements for safety or effectiveness before they reach the consumer. Also unlike drug products, manufacturers and distributors of dietary supplements are not currently required by law to record, investigate or forward to FDA any reports they receive of injuries or illnesses that may be related to the use of their products. Under DSHEA, once the product is marketed, FDA has the responsibility for showing that a dietary supplement is "unsafe," before it can take action to restrict the product's use or removal from the marketplace."
This just shows the general reasoning of why anabolic compounds will be constantly marketed as they can be reformulated and sold under a different name.
Phera-Plex - Phera-Bol, etc. etc.
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