Only turning into helium, nothing else.Incorrect.
Fred Hoyle in 1946 first described the mechanism for formation of elements up to iron in stellar cores. Even heavier elements are formed during supernovae.
Stellar Nucleosynthesis
This is all very well-established nuclear physics. Our own Sun doesn't produce anything other than helium right now, but when you consider how small it is in comparison to some other types of stars, that's hardly a relevant point.
So iron has been discovered on Betelgeuse and other Supernova? I must have missed that news bulletin. Or maybe it’s just theory. The bottom line is that evolution is a fraud and a lie. Fred Hoyle himself admitted that life could not have possibly begun by chance, and therefore he admitted that there was a god. And he was an athiest when he finally saw the light.