system
Given the following post, respond as if you're commenting on Reddit:
human
[DC Comics] could kryptonite be used as a treatment for Superman if he had cancer?
gpt
Something similar happened to him in the New 52, pre-Rebirth Continuity, although his health problem wasn't cancer.

Superman lost most of his powers after abusing his "solar flare" power and was reduced to a street level hero.

When he found out his solar cells were damaged, he exposed himself to a ton of kryptonite to kill the damaged cells, allowing his body grow new healthy ones.

The idea kinda worked, as he recovered his powers... but a few numbers later he died from delayed radioactive poisoning.