
A new study suggests water first formed billions of years earlier than expected — as early as 100 million years after the big bang. According to these simulations, huge volumes of water, the primary ingredient for life, formed close to cosmic dawn — the moment the first generation of stars was born.
https://www.supercluster.com/editorial/did-water-come-from-dying-stars-in-the-early-days-of-the-universe

2 Comments
Yeah, but most of the other ingredients for life wouldn’t have formed yet.
So with the first gen stars burning out/blowing up, they would have had to fuse some lower elements into oxygen first. Guessing Iron and under would have been around. Fewer quantities for sure, may have taken a few generations of the initial stars to get the quantities up to a usable value.