Overview
- Harvard's 30-year study of over 105,000 participants emphasizes the critical role of midlife dietary habits in promoting healthy aging.
- The Alternative Healthy Eating Index (AHEI) diet showed the strongest benefits, increasing the likelihood of healthy aging by 86%.
- Healthy aging was defined as reaching age 70 without chronic diseases or impairments in cognitive, physical, or mental health, achieved by just 9.3% of participants.
- Diets rich in plant-based foods and low in ultra-processed items were strongly linked to better aging outcomes, while high ultra-processed food intake reduced the odds by 32%.
- Researchers stress the adaptability of healthy diets to individual and cultural preferences but caution that the study's observational nature limits causation claims.