Indeed. Cold showers sure have potential to reduce wrinkle formation tho. And to make you temporarily much more alive, if not live longer (just go and try it, use as much cold as possible which probably means you will scream at start).
The centurian thing is probably ocam's razor: specific genes in combination with specific environment must be a good fit for longevity. Knowing that we are in no way closer in understanding anything about it, but at least we know we can't expect random centurian giving meaningful answer.
Cold showers make you feel better in general and they say it helps increase your immunity.
I've been experimenting with cold showers since the pandemic began, first it was through the summer, and I summoned up courage to continue it through the winter. There were some days when I thought I couldn't take the cold, so I used warm water instead. But I remember the stark difference I felt on those days compared to the rest when I showered in cold water.
If you can bear the cold, I would recommend it. Even if you can't, take it up as a challenge (that's what I did), to get your body to adapt to it. Totally worth it.
No, its more about experience (both personal and various books on topic) and understanding basic skin biology and how hot water with chlorine in it affects it.
The centurian thing is probably ocam's razor: specific genes in combination with specific environment must be a good fit for longevity. Knowing that we are in no way closer in understanding anything about it, but at least we know we can't expect random centurian giving meaningful answer.