A recent scientific study has observed the food groups displaced during walnut inclusion in the diets of adults with prediabetes. The participants in the study (31 men and 81 women) were randomly assigned to a diet with or without dietary counseling to regulate calorie intake. Within each treatment they were further randomized to receive a walnut-included diet with 56 g of walnuts per day or a walnut-excluded diet.According to the results of the study, the ingestion of healthful fatty acids, seafood and plant protein foods significantly increased with walnut inclusion, compared with their exclusion. Their data suggest that adding walnuts to the diets of adults at risk for type 2 diabetes may led to an increase in intake of more healthful foods.Njike, V. Y., Yarandi, N., Petraro, P., Ayettey, R. G., Treu, J. A., & Katz, D. L. (2016). Inclusion of walnut in the diets of adults at risk for type 2 diabetes and their dietary pattern changes: a randomized, controlled, cross-over trial. BMJ Open Diabetes Research & Care, 4(1), e000293.