Very comprehensive list of protein requirements by @AlexJLeaf . Seems like an RDA+ from healthy sources is a good idea in many if not all cases.
https://examine.com/nutrition/how-much-protein-do-you-need/

Alex has also written this article concerning the link between protein and aging. https://alexleaf.com/2019/05/12/why-protein-restriction-for-longevity-makes-no-sense/

Whatever the case might be concerning longevity, there's a difference between reaching RDA+ levels while building more muscle mass, reaching higher VO2Max etc... Or while just sitting around at home or at work. One can always lower intake once genetic limit is reached for muscle.

I'm going to up my #protein intake 1.6 g/kg, in the context of doing RT. Certainly once you are 25+ years old, these amounts are needed for gaining sufficient muscle mass. In theory after 4-5 years training you reach your genetic max mass muscle amount and you can lower it again.

Protein raises IGF-1 and is correlated with increased aging, I've seen @DrFuhrman claim that protein lowers lifespan even in carnivores. Although you never substantiated this with sources doc? Overall protein getting a bit off an overly fanatic pushback in WFPB circles I suspect.

Curious that Prof. Valter Longo recommends the 1.6/kg protein calculated for weight lifting for all people once they reach 65-70 years. Because otherwise IGF-1 would actually drop too low, he says add an egg. He recommends a pescetarian diet (= #naturalveganism) and not veganism.

Would you believe the little guy on the left is actually 18 years old? He's going to college next year. Has #Laronsyndrome, insensitive to GH/IGF-1. So, the thinking goes, wanna stay young? Limit protein intake...

But can we really compare such extremes with our own biology? These patients' stature resembles H. floresiensis more than they do us H. sapiens. Ideally, most of us, would want to grow during our teens, grow muscle during RT and keep fit at old age. It requires IGF-1, protein.

Concentrating on healthy protein sources could ameliorate the increased cancer & diabetes risk. Think whole grains, beans, algea. Maybe a little plant protein powder. And then you have smart animal based supplemental sources. I will have to think about those now as a pure vegan.

My approach is confirmed by research by Nir Barzilai M.D, Institute for Aging Research in [Age Later, 16 june 2020, St. Martin's Press]. SuperAgers with IGF-1 low genes have high IGF-1 during puberty, even making them taller on average. https://twitter.com/netgogate/status/1277539621749096448?s=20

This shows us that low IGF-1 is not needed across the entire life cycle in order to reap it's longevity benefits. Grow when you need to grow. And dial down once you reach genetic capacity. You won't need as much protein once the muscles are already built.

Adjustment of the before mentioned intake figures in this thread (1.6 grams), a little higher (2 grams) when one includes the increased needs of the organs. https://twitter.com/netgogate/status/1283389775211302912?s=20