Risk of prostate cancer mortality by fifths of protein anamino acid intakes in 131,425 male EPIC participants, including 914 deaths. All analyses were stratified for centre and age at entry and adjusted for baseline values of BMI, height, smoking status, physical activity, educational level, marital status, prevalent diabetes, and energy intake. For animal protein, protein from eggs and plant protein data were missing for the recruitment centre Umeå, Sweden; there was a total of 119,383 men in the analyses for these exposures, including 860 deaths. Full details of the number of participants and cases by fifth of intakes are shown in Table S1. HRs and 95% CIs for prostate cancer mortality are shown in Table S4. ptrend was calculated by rescoring the fifths with their median values. Abbreviations: CI, confidence intervals; EAA, essential amino acids; HR, Hazard ratio; NEAA, non‐essential amino acids.