Predicted decline in eGFR for a 10 g difference in plant and animal protein intake. (a) Predicted decline in eGFR for 30 g versus 40 g/day of plant protein intake; (b) predicted decline in eGFR for 50 g versus 60 g/day of animal protein intake. Covariables were set at: age at baseline = 75 years old, BMI = 26.9 kg/m², total energy intake = 6763 kJ/day, no diabetes, CHD or cerebrovascular accident and not taking anti-hypertensive medication; and for (a) animal protein intake = 48.9 g/day and (b) plant protein intake = 26.2 g/day.