For How long have the atoms in your body been around?

Answer 1

The atoms in your body have been around for billions of years. Most of the elements that make up your body, like carbon, hydrogen, and oxygen, were formed in stars and supernovae long before the Earth was created, roughly 4.5 billion years ago. This means that the atoms in your body could have originated from ancient stars that existed millions or even billions of years ago. In essence, the atoms are part of a continuous cycle of matter that has existed since the formation of the universe.