@jacobsonofjohn Conclusion: "A high-protein diet increases the risk of RHF(Renal hyperfiltration) and a rapid renal function decline in the general population. These findings suggest that a high-protein diet has a deleterious effect on renal function in the general population."
TLDR: High protein diets are rough on your kidneys.
Conclusion: "Although there has not been a full elucidation of the underlying mechanisms by which high protein intake may adversely affect kidney function, particularly in the context of CKD(Cronic Kidney Disease), existing data suggest that glomerular hyperfiltration caused by a high-protein diet may lead to an increase in albuminuria and an initial rise and subsequent decline in GFR(Glomerular filtration rate) ([Figure 2](javascript:void(0))). Furthermore, growing evidence suggests that high-protein diets may be associated with a number of metabolic complications that may be detrimental to kidney health. Given the rise in popularity of high-protein diets and the high prevalence of CKD in the United States population—including many individuals who may be unaware of their CKD status, further studies are needed to investigate how differences in dietary protein quantity and quality affect short- and long-term outcomes in patients with or without CKD."
TLDR: High protein diets are very likely bad for your kidneys in one way. More studying is needed before it's known if high protein diets are bad for your kidneys in other ways too.
I added the written out abbreviations in parentheses to make it more user friendly.