This is pretty opposite of the truth.
In the recent NPR podcast they talked about the fact that inventor of rapamycin practically cured himself of late stage cancer (given up to 6m of life, lived 5 years)
His cancer was nowhere to be found.
Then he decided to prove rapsmycin was the cause, stopped taking it, and died very shortly of cancer.
https://www.wnycstudios.org/podcasts/radiolab/articles/dirty...
Even if it cures some cancers, it may cause others (skin and lymphoma according to the study above). And the inventor's story is an anecdote, not a study.
I'm not saying with any confidence that Rapamycin is a bad thing. I'm just asking a question, which I think is fair, considering the long list of strong adverse effects in higher dosages:
