All matter in the universe beyond hydrogen (and perhaps a few helium atoms) was produced essentially in one way: forged through nuclear fusion in the bowels of stars. Young stars convert hydrogen into helium, and as the mass of the star increases, so too does the mass of the elements it can forge in its thermonuclear foundry, with the largest stars capable of producing iron. All the heavier elements in the universe were formed in the unfathomable death-throws of stars undergoing supernova explosions. Hence, everything in our Solar System, including the Earth and every living thing on it, was formed out of a massive cloud of gas and elemental “dust” left in space after the explosion of a massive star.
On the one hand, this means that you and I are all made of recycled stardust.
On the other hand, this also means that you and I are just vessels of nuclear waste.