A study conducted by a team from Harvard University has revealed that less than 10% of people experience what is known as 'healthy aging', defined as living to at least 70 years without chronic diseases and maintaining good physical and mental health.
Over a span of 30 years, researchers tracked the dietary habits of more than 100,000 middle-aged individuals and concluded in a study published in 2025 that only 9.3% of participants achieved 'healthy aging'. Their diets were characterized by a reliance on fruits, vegetables, whole grains, unsaturated fats, nuts, legumes, and low-fat dairy products.
Importance of Nutrition at All Ages
While healthy nutrition is essential at every stage of life, experts warn that many people do not realize that the quality of food does not yield the same results across all ages, and the need for proper nutrition begins in childhood and evolves with age.
Federica Amati, a nutrition scientist at Imperial College London, states that "many foods have nutritional benefits that are age-dependent," explaining that infants and young children require higher amounts of fats found in whole milk and dairy products, while this pattern is not suitable for those in their twenties and thirties.
Background & Context
Federica points to strong evidence that proper nutrition in childhood reflects on health in later stages. A study published in 2023 showed that children who consumed adequate amounts of fruits, vegetables, whole grains, legumes, healthy fats, nuts, and seeds, while minimizing ultra-processed foods by the age of seven, were less likely to develop heart disease by the age of 24.
Childhood nutrition aids in building the body, supporting immunity, and promoting brain and muscle growth by providing essential nutrients such as iron, iodine, vitamins, and minerals, especially vitamin D and calcium, which are crucial for normal bone growth, thereby reducing the risk of osteoporosis and fractures in older age.
Impact & Consequences
The foods we consume during adolescence and early adulthood lay the foundation for our future health, as this is a critical period for completing the development of bones and muscles, compounded by the pressures of study, work, and social interactions, which increase nutritional needs.
Federica emphasizes that this phase represents a "golden opportunity" to establish habits that protect heart and brain health later on, noting that many risk factors for heart disease develop during this time, even if symptoms do not appear until years later.
Regional Significance
She adds that there is increasing evidence that nutrition during adolescence can affect mental health; diets rich in ultra-processed foods and poor in whole plant foods are associated with higher rates of depression and anxiety, while patterns similar to the Mediterranean diet appear to be more protective due to their richness in vegetables, legumes, nuts, olive oil, and fish, with limited amounts of dairy and poultry.
In conclusion, maintaining proper nutrition may seem more challenging as one ages, but it becomes increasingly important.