Well, you have to think about the molecular structure of an atom for this question.
If the atom (matter), can not be destroyed or created, doubling your mass or destroying your mass entirely would be impossible. Your matter would be spread out evenly thrpughout the universe, filling every hole and sealing every crack.
However, considering once you have eaten your arm, leg, etc, it will be now in the contents of your stomach, and sooner or later you will bleed out and die, dropping a load on your way out, which will dissipate into the nearby air in the near future.
In Layman's terms: This thread is dildos, and you have weakened everyone's intelligence and well-being by posting this here.
May God have mercy on your soul.
-Amen.