It's very important to do research on what you are buying. When you see the weight loss product name and its nutritional benefits, go into the product website and read the entire package. If it's a food, read the nutrition facts label, especially in the ingredient list. You'll also find the nutrition facts on the back of the product, and on the packaging. Some of the product's ingredients can contain toxic substances, such as GMOs and dioxins. Do your own research.
You can find more information about what is in the product and how to find out what it's really made of. If you find it in a store, ask the store manager to look into what the ingredients are and if they can give you a better price. The store's name, the product's product number, the manufacturer's name, and the company's name should be on the label. Some companies label their product with a logo on the front and the product's name on the back. If you look at the back label, you can see if the product was manufactured in the US, and whether or not the ingredients have been tested in a lab before it was put in the store. I also recommend that you call the manufacturer directly.