Changes in Kidney Function Do Not Differ between Healthy Adults Consuming Higher- Compared with Lower- or Normal-Protein Diets: A Systematic Review and Meta-Analysis
https://academic.oup.com/jn/article/148/11/1760/5153345
Methods
We conducted a systematic review and meta-analysis of trials comparing HP (≥1.5 g/kg body weight or ≥20% energy intake or ≥100 g protein/d) with
normal- or lower-protein (NLP; ≥5% less energy intake from protein/d compared with HP group) intakes on kidney function.

Conclusions
Postintervention GFR comparisons indicate that HP diets result in higher GFRs; however, when changes in GFR were compared, dietary protein had no effect.
Our analysis indicates that HP intakes do not adversely influence kidney function on GFR in healthy adults.