Results showed that participants in the walnut group reported significantly higher intake of total protein, vegetable protein, total polyunsaturated fatty acids (PUFA), omega-3 and omega-6; and significantly lower intake of total carbohydrate, animal protein, saturated fatty acids (SFA), and sodium (Na), when compared with the control group. Although, daily energy intake was 228kcal higher in the walnut group, a 19% of total energy (kcal) and also a 25% of total fat from other food sources was displaced.
In conclusion, adding a daily supplement of walnuts to the habitual diet of elderly people may induce favorable modifications to the nutrient profile which may help prevent declining nutrient intake associated with aging.
Bitok, E., Jaceldo-Siegl, K., Rajaram, S., Serra-Mir, M., Roth, I., Feitas-Simoes, T., … & Sabaté, J. (2017). Favourable nutrient intake and displacement with long-term walnut supplementation among elderly: results of a randomised trial. British Journal of Nutrition, 118(3), 201-209.