Healthy dietary patterns linked to slower biological aging

A study involving approximately 7,500 adults suggests that various healthy dietary patterns are associated with slower biological aging. Researchers analyzed DNA methylation at roughly 850,000 sites to measure biological age, which reflects bodily wear and tear differently than chronological age.

By comparing participants' habits against ten different dietary models—including Mediterranean, Nordic, DASH, MIND, and plant-based diets—the study found that while no single “perfect” diet emerged, all healthy patterns were linked to slower aging markers. Interestingly, individuals who scored highly in one dietary model were not necessarily high scorers in others; only 18 participants ranked in the top 25% across all analyzed models.

The findings indicate that the overall quality of nutrition is more critical than strict adherence to one specific regimen. Common elements across the successful diets included higher consumption of fruits, vegetables, whole grains, legumes, nuts, and unsaturated fats, alongside a reduction in highly processed foods, red meats, and sugary drinks.