I’m reading this book, by a person named Nick Lane, a biochemist working in London.
The essence of it is that the mitochondria & the TCA (Krebs) cycle have a lot more effect on aging & cancer than one would imagine (or at least than people once thought).
It’s fairly dense biochemistry & I’m not going to try to summarize it. That would be like me trying to sculpt Michalango’s David from a stick of butter while sitting in a tent in the Sahara.
My point in bringing it up, besides that it’s interesting to me, is that it appears to me that close study of the mitochondria may be a fruitful direction for research into longevity, so others on this forum might be interested as well.