IMO weight loss "products" are the biggest load of shit going. Tablets, slim fast, herbalife...bleh, whatever, all a load of tosh.
Get yourself onto myfitnesspal.com, enter your details and just do what it says. Weight loss is nothing more than calories in vs calories out, and this site will help you work out how many calories you need a day to lose weight. It might be worth investing in a food scale to assist you further.
I've had a weight problem all my life and have just started using MFP. I started about 70 days ago and already lost 10lb just simply eating less and logging every single last gram I shove in my mouth.
You don't need pills or other stuff to assist you. MFP will guide you and help you along the way to achieve your goals and there are thousands upon thousands of people who have used this site with success.