system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What really happens when people die of "old age" or "natural causes" ?
gpt
what happens is the family and doctors agree it is not worth determining what the actual cause of death was.

actual cause is often heart failure, but frankly could be almost anything that isn't blatantly obvious from an external inspection.

edit: stroke is another common cause. may actually be even more common that heart attack for "old age" deaths, as it can hit suddenly with less obvious symptoms.