Fat Burner

I'm wondering if these products are worth their price?  I've seen many of them on the market and they are full of side effects should you ingest them.  A good  natural fat burner  is to be considered rather than one full of chemicals.  Organic products seem to be on the rise in sales, because of the products that have been laced with unknown chemicals and resins.  Today, people want to be healthy the right way, not hopped up on some drug.