National Harbor, Md. (July 25, 2026) — A new analysis of more than 66,000 postmenopausal women suggests that aligning daily eating patterns with the Planetary Health Diet may lower the long-term risk of cardiovascular disease. The study links diet quality—captured through a structured adherence score—to multiple cardiovascular outcomes over roughly two decades of follow-up.
Researchers used data from the Women’s Health Initiative, a large, long-running U.S. cohort study supported by the National Heart, Lung, and Blood Institute. At baseline (1994–1998), participants were free of cardiovascular disease and had complete information on dietary intake and relevant lifestyle factors.
Diet was assessed at study entry using a food frequency questionnaire. Investigators converted each participant’s intake into a Planetary Health Diet Index score, where higher values indicate closer adherence. Women were then categorized into five groups according to how closely their diets matched the Planetary Health Diet.
The diet pattern emphasizes plant-forward foods including fruits, vegetables, whole grains, legumes, nuts, and unsaturated fats, while restricting red and processed meats, added sugars, refined grains, and saturated fats. This framework aims to improve both health and environmental sustainability, though the current work focuses on cardiometabolic risk.
Over approximately 20 years, cases of cardiovascular disease were tracked and analyzed using statistical models adjusted for major confounders such as age, race and ethnicity, education, income, smoking, alcohol intake, physical activity, body mass index, and total calories.
Women with the highest adherence showed about a 28% lower risk of overall cardiovascular disease compared with those in the lowest-adherence group. Importantly, the study also found benefits were not limited to strict adherence—moderate adherence was associated with measurable risk reductions.
Each 10-point increase in the Planetary Health Diet Index corresponded to additional decreases in risk, supporting a dose-response pattern across adherence levels. Investigators reported similar trends across coronary heart disease, stroke, and heart failure, suggesting the association may extend beyond a single cardiovascular endpoint.
The results are based on observational methods, meaning the design cannot prove that the diet directly caused the lower risk. Still, the findings highlight practical dietary flexibility for older adults, particularly for postmenopausal women whose cardiovascular risk tends to rise with age.
The presenting researcher, Donya Shahamati of the University of California, Irvine, will share these findings in a poster session at NUTRITION 2026 on July 25, where selected abstracts are reviewed by an expert committee but have not yet undergone the standard peer-review process for journal publication.
Subject of Research: Planetary Health Diet adherence and cardiovascular outcomes in postmenopausal women
Article Title: Not provided
News Publication Date: July 25, 2026
Web References: https://nutrition2026.eventscribe.net/ajaxcalls/PosterInfo.asp?PosterID=811452
References: Women’s Health Initiative (WHI); NUTRITION 2026 abstract and poster session details
Image Credits: Not provided
Keywords: Planetary Health Diet; cardiovascular disease; postmenopausal women; diet quality; observational study; coronary heart disease; stroke; heart failure
Tags: cardiometabolic risk reductioncardiovascular disease preventiondiet quality and heart healthdietary adherence scoringenvironmental sustainability and healthlong-term dietary impactPlanetary Health Dietplant-based dietsplant-forward nutritionred and processed meat restrictionsustainable eating patternswomen’s health initiative study
