The New Year traditionally means making resolutions and, for many, it's losing weight. If you are among them, heed this warning by the Food and Drug Administration Tuesday.

The agency has identified 28 weight loss products that contain potentially harmful, even deadly, ingredients. Many of these pills are advertised as "natural" fat burners and sell under names such as "Imelda Perfect Slim", "Shape-Pro-Slim", "Slim-Perfect" and even "Venom Hyper-Drive 3.0."

The FDA says these products, and others, contain prescription drugs in dosages well above maximum daily limits. These are ingredients not listed on the labels.

Other ingredients are powerful appetite suppressors and a suspected carcinogen. The FDA is even considering criminal charges against some companies that have not complied with recommended recalls.

The full list from the FDA is:

2 Day Diet
3x Slimming Power
Japan Lingzhi 24 Hours Diet
5x Imelda Perfect Slimming
3 Day Diet
7 Day Herbal Slim
8 Factor Diet
7 Diet Day/Night Formula
999 Fitness Essence
Extrim Plus
GMP
Imelda Perfect Slim
Lida DaiDaihua
Miaozi Slim Capsules
Perfect Slim
Perfect Slim 5x
Phyto Shape
ProSlim Plus
Royal Slimming
Formula
Slim 3 in 1
Slim Express 360
Slimtech
Somotrim
Superslim
TripleSlim
Zhen de Shou
Venom Hyperdrive 3.0