Best weight loss supplements

What are the best weight loss supplements available in the market? No advertisements are being made to sell the products so I have no idea on what to recommend to my friends. Most dietary supplements being advertised pills that claim they can make a person lose pounds in a short period of time. But I do believe that these products don’t really have the ability to eliminate unwanted body fats, but instead, they reduce the water in a person’s body to make him/her feel lighter.