Key points from article :
A recent study, presented at a nutrition conference, examined the impact of dietary habits in midlife on long-term health. Harvard researchers analysed 30 years of data from over 106,000 participants in two major studies: the Nurses’ Health Study and the Health Professionals Follow-Up Study. This analysis, which included both men and women, involved participants filling out food frequency questionnaires every four years to track their dietary patterns.
The researchers focused on three dietary patterns: the DASH diet, which aims to lower blood pressure; the Alternative Healthy Eating Index (AHEI), which encourages more legumes and vegetables; and the Planetary Health Diet, which emphasizes plant-based foods while allowing some meat. They found that adherence to these diets was linked to better health outcomes in old age.
Results showed that those who followed healthier eating patterns had significantly higher chances of ageing well, defined as being free of chronic diseases, having good cognitive function, and maintaining physical health. Conversely, diets high in trans fats, sodium, and processed meats were associated with poorer ageing outcomes.
Despite these findings, the study’s observational nature means it does not prove causation but rather shows a strong association between diet and healthy ageing. The study, not yet published but under peer review, aligns with previous research suggesting that a nutritious diet can improve long-term health prospects.
Experts support these findings, emphasising that a balanced diet, along with other healthy lifestyle practices, contributes significantly to better health later in life.
