Big fat diet pill trouble from China

If it sounds too good to be true, it probably is. And when it comes to the promises made by the manufacturers of weight-loss pills, you bank on it.

The FDA just issued a warning for U.S. residents to steer clear of as many as 30 "natural" fat busters - many of which are from China.

Most consumers don't know what's in these drugs - which have names like "Imelda Perfect Slim" and "Zhen de Shou" - because most of the ingredients are unlisted.

But here's what I do know… The key ingredient of many of these drugs is sibutramine - a chemical that's actually found in the prescription anti-obesity drug Meridia. The fact that it's in there at all is bad enough, but it's in there in whopping dosages - as much as THREE TIMES the recommended daily dosage.

It gets worse. Some of the pills also contain phenolphthalein, a chemical that was once used as a laxative but has since been withdrawn from the market because it MIGHT CAUSE CANCER.

Of course, you won't find either of these ingredients listed on the box. These pills are chock full of uppers and laxatives and that can leave you chained to the john for hours at a time. But the worst part is that ingesting high dosages of these drugs (especially sibutramine) could actually trigger stroke or heart attacks in people with a history of heart issues or high blood pressure.

Click here for a list of the drugs on the FDA's warning list.