Popular protein drinks harmful to your health?

Fans of protein drinks like Muscle Milk and EAS Myoplex may want to put down their glasses. Consumer Reports found that many of these popular beverages contained low to moderate levels of heavy metals and other harmful contaminants, with three containing higher levels than recommended by the U.S. Pharmacopeia.

"Our main concern is that consumers who are taking these products on a regular basis -- in many cases, the directions recommend multiple servings a day -- can be exposed to heavy metals that exceed USP guidelines," Consumer Reports senior editor Andrea Rock told WalletPop in a telephone interview.

Most at risk are teenagers, pregnant women, diabetics and people who do not have fully functioning kidneys or have some kidney damage, added Rock.