First of all, I’m aware of TBAB and How to optimize protein intake articles and with BBM guidelines. What I have been looking for, and I think the unmoderated forum in sufficient to help with this, is scientific literature endorsing the 1.6~2.# grams of protein per kg of body weight. I’ve been trying to steer a family member into eating more protein in a day than the 0.8~1g she’s aiming at. Therefore, the more factual and less biased to a certain ethos (as myself and BBM), the better. I have looked for references on the articles I mentioned, but I think the doctors started to put them in the articles after that time. However, I’m sure they have already been provided in the forums, at least, but the search didn’t help much.
Helms, Eric R et al. “Evidence-based recommendations for natural bodybuilding contest preparation: nutrition and supplementation” Journal of the International Society of Sports Nutrition vol. 11 20. 12 May. 2014, doi:10.1186/1550-2783-11-20
Morton, Robert W et al. “A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults” British journal of sports medicine vol. 52,6 (2017): 376-384.
Helms, E. R., Zinn, C., Rowlands, D. S., & Brown, S. R. (2014). A Systematic Review of Dietary Protein during Caloric Restriction in Resistance Trained Lean Athletes: A Case for Higher Intakes. International Journal of Sport Nutrition and Exercise Metabolism, 24(2), 127–138. doi:10.1123/ijsnem.2013-0054
This is a small fraction of the available literature on the matter.