Effect of P/T depletion on OEs is age dependent. a) There is no effect of P/T depletion on total OEs b) There is no significant beverage × block interaction on OEs. c) There is not a significant correlation between the age of the participant and the effect of P/T depletion on PAEs. d) When participants are separated into emerging adult (22–25 years old) and adult (26–40 years old) groups, there is a significant beverage × age group interaction (F(1,14)=5.57; p=0.033, η2=0.26). OEs, Omission Errors; P/T[−], phenylalanine/tyrosine-depleted beverage.