Belkyra is an injectable that destroys the walls of fat cells with which it comes into contact, causing them to no longer be able to store fat. When injected, it dissolves the fat-cell walls, causing the fat to vanish.
When you get it, you get an injection of deoxycholic acid, which makes your submental fat look less noticeable.
Cell debris turns into waste, which is then carried away by your lymph system and bloodstream and metabolized. Then your body gets rid of it.