He literally puts his bench on his website: it's 240lb. I know what he benches because he told me. Neither you nor I have to wonder about anything.
The plasma cycle thing is odd and I have concerns about coercion. However, I think most people are critical of him because he's richer and/or fitter than they are or because he's unusual, not making a principled moral stand. They're missing out: his self-experimentation is fascinating. 90% of it is probably bullshit or only gives a tiny incremental gain, but I just think it's neat that he keeps an unhinged geocities-tier[0] page detailing why he eats hummus with un-dutched dark chocolate from low heavy metal plantations. It's even neater that it's actually working for him in some empirical sense.
This specific case seems like there's not a strong enough need and too high a potential for coercion, but would you really complain about how my father was "HARVESTING HIS OWN SON" if his kidneys failed and I donated one of mine?
Anyway, the blood plasma stuff isn't the only thing that's fascinating, everything else is too. Go read his website. It's unhinged: as noted by you, he harvests his son for himself, and himself for his father; he writes shit like "My mind is demoted, Self is elevated"; he pays $11/serve for what's basically broccoli, cauliflower, and lentils; he pays for pretty much every single measurement it's possible to take. It's interesting: all the hard-to-fake biomarkers for performance look good, from heart rate to VO2 to bench; he was having so much blood drawn that he got an ultrasound of his veins to see what damage he'd done; he posts gifs of a capsule camera going down his gastrointestinal tract.
He's an insane person who posts his life on the internet and I find him fascinating. The HARVESTING of HIS OWN SON is really, genuinely interesting, and it doesn't stop being interesting just because it's weird and unlikely to do much.
The plasma cycle thing is odd and I have concerns about coercion. However, I think most people are critical of him because he's richer and/or fitter than they are or because he's unusual, not making a principled moral stand. They're missing out: his self-experimentation is fascinating. 90% of it is probably bullshit or only gives a tiny incremental gain, but I just think it's neat that he keeps an unhinged geocities-tier[0] page detailing why he eats hummus with un-dutched dark chocolate from low heavy metal plantations. It's even neater that it's actually working for him in some empirical sense.
[0] https://blueprint.bryanjohnson.co