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Isn't it simply because these people won't ever get cancer, and so they die of something else. So if you reach a certain age you outlive most people that would die from cancer.

And then always researchers try to find a clue in the patient and see like oh hey they have more iron, iron must be the solution, but maybe the person just didn't get cancer because (s)he had a healthy lifestyle and relatively little stress.

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> … these people won't ever get cancer …

Prostate cancer is surprisingly prevalent but (commonly) slow-proliferating, and is often “beaten to the punch” by other causes of mortality.

Or maybe the researchers are smart enough to control for things like that, and have actually discovered a mechanism.

Or they aren't. Nothing is telling me they are smart enough for that. In fact if you look at most scientific research it seems they don't think, or maybe care about this. Because their motives are finally to make new medicines they can sell. That is what they're interested in, not in really healing people.

At least, maybe the researchers themselves are interested, but they're funded for making medicines to sell, not for healing people.

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