Urinary metabolic markers at days 1 and 7 postirradiation, based on comparison between equidoses and radiation type. L-phenylalanine, phenylpyruvic acid and N-decanoylglycine exhibited statistical significance when comparing 1 Gy neutrons vs. 1 Gy X rays at day 1. Phenylpyruvic acid, xanthurenic acid, decanoylcarnitine and sebacic acid were significantly different between the equidose groups at day 7. All data are presented as mean ± SEM. *P < 0.05, **P < 0.01, ***P < 0.001 (Welch’s t test).