Lead researcher Anne-Julie Tessier emphasizes that it is never too late to improve one’s diet, suggesting that gradual changes can be more sustainable and effective.

Diet is identified as a leading behavioral risk factor for chronic diseases and mortality, indicating that dietary changes could significantly enhance longevity.

A recent study published on March 24, 2025, highlights the significant benefits of the Alternative Healthy Eating Index (AHEI) diet, which emphasizes fruits, vegetables, whole grains, and healthy fats while limiting red and processed meats.

This research, drawing on data from over 105,000 participants in the Nurses' Health Study and the Health Professionals Follow-Up Study over a span of 30 years, found that adherence to the AHEI diet increased the likelihood of healthy aging by 86% for those in the highest adherence quintile by age 70.

Additionally, the observational nature of the study does not establish causation, and potential biases from self-reported dietary data were noted, although the methodology was robust.

Public health authorities emphasize the importance of healthy lifestyle habits, including balanced nutrition and regular physical activity, for promoting longevity and reducing chronic disease risk.

The study provides substantial evidence supporting the benefits of a plant-based diet, with experts agreeing that incorporating more plant-based foods can lead to significant health benefits.

Despite these promising findings, only 9.3% of participants achieved healthy aging, defined by cognitive, mental, and physical health, as well as being free from chronic diseases by age 70.

However, the study's limitations, including its exclusive focus on health professionals, suggest that further research is needed across diverse socio-economic groups to validate these findings.

Experts, including Dr. Mir Ali, underscore the implications of the study for long-term health benefits through dietary changes, particularly as the population ages.

With the US population of older adults on the rise, and 80% experiencing at least one chronic health condition, effective strategies to promote healthy aging are increasingly critical.

Overall, healthy aging is prioritized globally to enhance quality of life, encourage societal contribution, and reduce healthcare costs.