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Regular nut consumption, particularly peanuts and walnuts, is associated with a lower incidence of frailty in aging female populations.
2023 The Journal of Nutrition Long-Term Consumption of Nuts (Including Peanuts, Peanut Butter, Walnuts, and Other Nuts) in Relation to Risk of Frailty in Older Women: Evidence from a Cohort Study Wang R, Hannan MT, Wang M, Schwartz AW, Lopez-Garcia E, Grodstein F
Cohort Study Anti-Ageing Frailty Peanut
The methodology of the study includes a population-based observational study of nonfrail women aged 60 and above from 11 states across the US, from the Nurses' Health Study. The outcome focused on incidence of frailty, defined through the FRAIL components such as fatigue, lower strength, reduced aerobic capacity, multiple chronic conditions, and significant weight loss. These were assessed every four years from 1992 to 2016. Food Frequency Questionnaires were used to examine the intake of peanuts, peanut butter, walnuts, and other nuts every four years from 1990 to 2014. Total nut consumption was calculated and categorized into varying serving sizes, and the relation of intake of each type of nut with frailty was examined separately using Cox proportional hazard models, adjusted for various factors such as age, smoking, BMI, diet quality, and medication use.
In discussing the results, out of 71,704 participants, 14,195 frailty cases arose over a million person-years. Notably, regular consumption of nuts, particularly peanuts and walnuts, showed a significant inverse relation with frailty. That is, a higher intake of these types of nuts were associated with lower cases of frailty. However, the same didn't apply to peanut butter. This affirms the potential benefits of regular nut consumption in aging female population's health and well-being.
Regular peanut consumption appears to positively influence lipid metabolism, reducing levels of triglycerides in the blood.
2022 Frontiers in Nutrition Effect of Peanut Consumption on Cardiovascular Risk Factors: A Randomized Clinical Trial and Meta-Analysis Parilli-Moser I, Hurtado-Barroso S, Guasch-Ferré M, Lamuela-Raventós RM
Meta-Analysis Peanut Triglyceride
In the ARISTOTLE study, a randomized control trial was conducted with 63 participants who consumed either 25g/day of skin roasted peanuts, two tablespoons of peanut butter per day, or two tablespoons per day of a control butter based on peanut oil alongside their usual diet for a period of 6 months. This was done to understand the impact of regular peanut consumption on anthropometric, biochemical, and clinical measurements. Additionally, a meta-analysis was carried out incorporating data from several clinical trials, including the aforementioned ARISTOTLE study, to further consider the effects of consuming peanuts and peanut butter in both healthy individuals and those at a high cardiometabolic risk.
The findings from the ARISTOTLE study indicated that lower total cholesterol/HDL-cholesterol and LDL-cholesterol/HDL-cholesterol ratios were observed in the group consuming skin roasted peanuts compared to the control butter group. Furthermore, the meta-analysis of clinical trials highlighted an association between peanut consumption and a decrease in triglycerides. It was seen that healthy consumers had lower total cholesterol and LDL-cholesterol/HDL-cholesterol ratios compared to control groups. However, it was also discovered that individuals at a high cardiometabolic risk experienced an increase in body weight following the peanut interventions, despite no change in body fat or body mass index. From the dose-response analyses, it was inferred that body weight slightly escalated with higher dosages of peanuts.