D.W.
I'd strongly encourage you not to try them. Unfortunately, most of the companies that advertise supplements on the radio/TV have no scientific or clinical evidence to support their products and claims of effectiveness.
Look the product up on FDA.gov. If it's not listed, it's a warning sign to stay away because there company has not done the research to prove their products actually work and often pay "consultants" to give testimony.
My previous company has been working on a weight loss drug for almost 12 years and has still not satisfied the FDA with clinical data despite dozens of clinical trials with thousands of patients to guarantee safety.
Unfortunately, most weight loss products don't really see more than 5% weight loss in most patients because the science of losing weight is SO complex. Cortoslim was another product heavily advertised a few years to help block cortisol absorption. I asked an Endocrinologist about it, and he said it was snake oil. Many of the hormones associated with weight regulation have no therapeutic equivalent on the market (leptin, ghrelin, etc). So, products that claim to replicate their actions are not legit.
Here's an example of a product that made similar claims and was prosecuted by the FTC for violating trade laws:
http://www.ftc.gov/opa/2003/07/ephedra.shtm
The best diet supplement is either increasing fiber to a healthy diet or seeking the advice of a Registered Dietician who can help you come-up with a game plan based upon how and what you like to eat. Chances are, insurance will cover the costs, and every hospital has one on staff.
