The first thousand days: nourishing the developing brain for a lifetime of mental well-being. Narrative review

The first thousand days of human life, a period stretching from conception to a child’s second birthday, represent a remarkable window of opportunity, a time of unparalleled growth and development, particularly for the brain.1 This intricate organ, the command center of our thoughts, emotions, and behaviors, undergoes its most rapid and significant transformation during these crucial early years. The nourishment it receives during this period lays the very foundation for cognitive abilities, emotional resilience, and mental health that will extend far into childhood, adolescence, and adulthood.2 Just as a sturdy house requires a strong foundation, a healthy mind relies on the building blocks provided by optimal nutrition in these initial thousand days. The American Academy of Pediatrics emphasizes the profound impact of nutrition during this period, recognizing it as a key determinant of both childhood development and long-term adult health.1 This isn't merely about physical growth; it's about the very architecture of the brain being sculpted by the nutrients we consume. From the intricate network of neurons to the insulating myelin sheaths that facilitate rapid communication, every aspect of this complex organ relies on a consistent and adequate supply of essential building blocks.3,4 This article is authored by members of the Working Group on Social Pediatrics of the Union of National European Pediatric Societies and Associations (EPA-UNEPSA) and presents the group's perspective on the impact of nutrition on mental health during the first 1000 days of life. The position was developed on the occasion of the international meeting on the importance of promoting child mental health, held in Piazzola sul Brenta, Padua, Italy, on 9 November 2024. The event was organized and supported by the Giordano Emilio Ghirardi Foundation, in collaboration with EPA-UNEPSA, as part of the global initiatives marking World Mental Health Day 20,24.5 The primary aim of this informative article is to raise awareness among the various professionals involved in protecting and promoting mental health in children and adolescents—as well as outreaching the broader civil society—about the critical importance of nutrition during the first 1000 days of life in safeguarding the mental well-being of young people. The article provides a concise, educational overview of key nutritional factors that support a healthy transition from childhood to adulthood. It underscores the importance of ensuring safe and adequate nutrition during this critical developmental period to protect and nurture mental health.