...find out what that medication, pill, cream or supplement really does to you. Did you know that the FDA does not regulate supplements or lotions? Unless there is a medical claim for the product the FDA does not usually get involved. They do get involved after the fact of someone getting hurt or killed because of a product. Take for example the Hydroxycut recall that the FDA issued a few weeks ago. That product was reported to cause liver failure in people.
Do your self a favor and investigate any product that makes claims of weight loss or increasing your metabolism. Even if it is a famous product like Alli,Apidexin or even Slimfast. Check it out first. Find out what those ingredients really are. If they state "a secret formula" then stay away from that product. You have every right to know what you are ingesting or putting on your skin.