We cannot yet turn a 70 y.o. into a 50 y.o., no. We are nowhere near that kind of technology.
But we might be able to turn 70 y.o. into 67 y.o. relatively soon. In fact, there already was an experiment in humans which turned their epigenetic clock back 2,5 years by rejuvenating their thymuses.
(Of course, the complicated relationship between epigenetic clock and real internal state of the organism is not fully clear yet. I know. This might be a very imperfect measure.)
This kind of baby steps is going to compound. I am sort of afraid of the possibility that we will ignore the baby steps until their aggregated weight is unconquerable, much like the climate crisis, where any single added chimney meant "almost nothing", but all of them together over decades meant a lot.
But we might be able to turn 70 y.o. into 67 y.o. relatively soon. In fact, there already was an experiment in humans which turned their epigenetic clock back 2,5 years by rejuvenating their thymuses.
https://www.nature.com/articles/d41586-019-02638-w
(Of course, the complicated relationship between epigenetic clock and real internal state of the organism is not fully clear yet. I know. This might be a very imperfect measure.)
This kind of baby steps is going to compound. I am sort of afraid of the possibility that we will ignore the baby steps until their aggregated weight is unconquerable, much like the climate crisis, where any single added chimney meant "almost nothing", but all of them together over decades meant a lot.
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