Fitorex«Eating a lot of protein damages your kidneys»
Nuanced
What the evidence says
In people with healthy kidneys, high-protein diets (up to ~2.2–3 g/kg) do not harm renal function according to current evidence. The caution applies only to those who already have pre-existing kidney disease, who should indeed moderate it under medical supervision.
How settled this is
No demonstrated kidney damage in healthy populations; individualise if there is pre-existing pathology.