The average 150 lb adult human body contains approximately 7×10tothe27 atoms and contains at least detectable traces of 60 chemical elements.
About 29 of these elements are thought to play an active positive role in life and health in humans.
Our Hydrogen was made at the very first instant of the universe in the Big Bang 13.8 billion years ago. All our other elements were manufactured in the cores of stars billions of year ago.
You can argue all day about what happens after death. But we all know what happens. We return to our universe to be reborn again as something else that will live and die and be reborn again into something else. For all eternity.
We are immortal.