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High protein intake does not damage healthy kidneys. In established CKD, very high protein intakes can accelerate progression, and dialysis patients need MORE protein (1.2 g/kg/day), not less.
In people with healthy kidneys, even high-protein diets (bodybuilding levels) do not cause CKD — large cohort studies show no increased kidney failure risk in high-protein eaters. The kidneys simply adapt, increasing filtration.
In CKD, a high protein diet (above ~1.3-1.5 g/kg/day) adds filtration burden and can speed progression. KDIGO suggests avoiding high protein intake in CKD — moderate protein (0.8-1.0 g/kg/day) is recommended, with protein restriction only under specialist supervision.
The opposite problem is common and dangerous: dialysis patients who eat too LITTLE protein. Dialysis removes amino acids, and low intake drives the malnutrition that is the strongest mortality predictor in dialysis.
Protein source matters in CKD: plant proteins (lentils, beans, soy) may be gentler than equivalent animal protein loads, and processed meats add phosphorus additives.
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This content is a general reference, not medical advice, a diagnosis, or a treatment plan. Do not change your diet, fluids, medicines, or dialysis plan without your nephrologist or renal dietitian. Individual recommendations depend on your labs, medications, conditions, and care plan.