I'm not through the whole thing yet. A few things I noted.
1. Metformin
A lot of really smart people in the field of anti-aging and longevity research (Peter Attia, Dr Sinclair, Navdeep Chandel, Nir Barzilai; this is one of the few people who studied Metformin in the 80s before it ever went through trial) always bring it up in matters of anti aging. AMPK's role (pokes at mitochondrial complex 1, then ampk which then also inhibits MTor), maintaining blood glucose, changing of the gut microbiome; all of this makes it a very interesting drug.
Dr. Barzilai podcast with Peter Attia which came out a few weeks ago was brilliant on Metformin and IGF (one of the biggest takeaways being that IGF's effects on women for longevity were more antithetical compared men; females didn't get the same benefit of IGF, these were Dr Attia's thoughts as well. And we all know the inverse relationship between IGF and longevity so for women to sit even lower on that curve is rather interesting.
You're getting anti diabetic, anti inflammatory, anti-cancer effects from one drug. Dr Sinclair talking about taking it himself when he's not diabetic tells you something; but I do have my own personal thoughts on the entire picture which for bodybuilders might be different.
2. Disposable Soma Theory of Aging. Kirkwood's theory on how tradeoff for a large organism (or one that develops faster) is death essentially, because the resources used for DNA repair in a smaller developing organisms are allocated more towards growth and reproduction leading to a shorter overall lifespan. Notice how bodybuilding fits into this. We turn EVERYTHING up to it's fullest potential in hopes of accruing muscle mass. MTOR, IGF, Insulin Levels, Oxidation; everything to do with cellular aging sits in the realm of muscle growth.
While no long term study is available or even viable to study aging in bodybuilders, it's safe to say that DNA damage and the rate of repair can't possibly be kept up to par in a bodybuilder's body.
3. I DO NOT want to look like these guys. A lot of these guys who have spent their lives studying these topics (people have NO idea how complex metabolism is) are absolutely brilliant; you're talking a lifetime of commitment to something that might change the way human beings progress biologically.
But they aren't
bodybuilders. And I don't want to be a meat allergic guy who runs 2x a week on a treadmill steadily, and does some circuit work with bands on the weekend (I know, I'm generalizing). So our lifestyle is obviously going to differ from the things that are the primary focus of people trying to live the longest. But I think mitigating risks, understanding risk factors, introducing elements that will help slow the process of aging (both cellularly, and chronic diseases that kill us) can help us be as big and healthy for as long as physiologically possible.
Just my thoughts on this stuff; which I personally believe is such a fascinating topic