[jarvist]

After the big bang and the expansion, and the condensation of energy into matter, the universe was almost entirely hydrogen and helium (i.e. extremely boring). The heavier elements were fused together in the solar furnances (stars). The early stars were enormous, burnt through their fuel (walking up the Periodic Table to Iron) and then collapsed under the gravity pressure when the fuel ran out and exploded in a Supernovae. During these explosions a smattering of the heavier (than Iron) elements are fused together. Our sun is a ~third generation star, made from the remains of other exploded stars.

So it's more that we are all star stuff; everything heavier than Iron (all the Lead, Tin, Iodine, radioactive elements, rare Earths etc.) are exploding star stuff.