Millions of people lost weight before some bunk concoctions came in the play. Your best bet is a healthy diet and cardio if you're really interested in losing weight. Lifting low weights and high reps is going to help. They're also a lot of natural foods you can eat that help a bit with fat loss but for the most part you just have to be smart with what you eat. Eliminating sugar from your diet is a huge thing.
Take care of your body and it will take care of you.
At the end of the day you don't need fat burners or any garbage like that. Most of it is completely unhealthy and definitely unnecessary
It's the lazy man's way out