Higher Protein Intake Does Not Accelerate Kidney Decline in Older Adults
A 10-year Norwegian cohort of 1,324 middle-aged and older adults measured iohexol-based GFR and found that higher habitual protein intake (mean 1.2 g/kg/d) was not associated with faster GFR decline, accelerated decline, or incident CKD, suggesting protein restriction may not prevent CKD. Limitations include FFQ-based protein estimates and lack of 24-hour urinary urea validation.