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Retrieval efficiency calculated using the Korean version of the Rey Auditory Verbal Learning Test (KAVLT) delayed recognition raw score minus delayed remembrance raw score followed by conversion using the age conversion table is exhibited on the y-axis. The change in retrieval efficacy before and after intake of fibroin protein enzymatic hydrolysate (FPEH) for 3 weeks was not significant between groups by ANOVA (p = 0.3959). Each value is the mean with the SEM.
