You got it right, avoid the supplements with ephedra and other stimulants such as caffein. If you are looking for the best way to loose weight, check out this blog

Here you can learn the secrets how to loss fat permanently

Hope this help,

“What should I be careful about when buying fat loss supplements?”
Be careful not to buy them. At all. Period. They’re not healthy at all, and they have awful side effects.

Learning to love yourself the way you are works

There is no such thing as fat loss supplements. Anyone who tells you there is is trying to rip you off. Diet and exercise works every time. There are no shortcuts.

You might want to save your money. Lots of them use caffeine derivatives and they charge plenty for them. You will get the same results from drinking coffee.
If you cut out refined starches and all forms of sugar from your diet you will naturally burn stored bodyfat.
For a good fat-burning diet program google The Tran Tien Diet. He originally created this for athletes.