First 1000 Days: Pathways to Improved Child Nutrition, Development, and Lifelong Health Outcomes

The first 1000 days — from conception to a child’s second birthday — form the most consequential window for shaping lifelong health. During this period, brain growth, immune programming, metabolic patterning, and the establishment of the gut microbiome are uniquely sensitive to nutrition, infection, caregiving, and the wider social environment. Evidence published since 2023 continues to strengthen the case that early-life exposures influence cognition, mental health, cardiometabolic risk, obesity, and educational attainment decades later, with recent Lancet and WHO commentaries extending the conversation into the “next 1000 days.” Yet global progress is uneven: stunting, wasting, micronutrient deficiencies, food insecurity, and the double burden of malnutrition persist alongside rising early-onset obesity and growing recognition of perinatal mental health as a determinant of child outcomes.

This Research Topic brings together original research, clinical trials, and contemporary reviews that advance understanding of how nutrition, caregiving, and policy interact during the first 1000 days to shape child and adult health. We welcome interdisciplinary contributions aligned with SDGs 2 and 3 that translate mechanistic insight into scalable, equitable interventions for families, clinicians, and policymakers.

Key themes of interest include:

• Maternal Nutrition and Prenatal Determinants of Child and future adult Health — focuses on the period from conception through pregnancy.
• Early Infant Feeding Practices and Nutritional Security — centers on birth to 6 months and complementary feeding transition.
• Brain Development, Cognitive Growth, and Responsive Caregiving — emphasis on neural development, stimulation and mental health.
• Malnutrition, Infection, and Long-Term Health Risks — addresses developmental vulnerabilities during early childhood.
• Public Health Interventions and Community-Based Support Systems — covering policy and programme to prevent malnutrition.
• Maternal mental well-being and role of family during the postpartum period to establish early child development activities to support emotional, social, language and intellectual development.

Article types and fees

This Research Topic accepts the following article types, unless otherwise specified in the Research Topic description:

• Brief Research Report
• Case Report
• Classification
• Clinical Trial
• Community Case Study
• Conceptual Analysis
• Data Report
• Editorial
• FAIR² Data
• ... View all formats

Articles that are accepted for publication by our external editors following rigorous peer review incur a publishing fee charged to Authors, institutions, or funders.

Article types

This Research Topic accepts the following article types, unless otherwise specified in the Research Topic description:

• Brief Research Report
• Case Report
• Classification
• Clinical Trial
• Community Case Study
• Conceptual Analysis
• Data Report
• Editorial
• FAIR² Data
• General Commentary
• Hypothesis and Theory
• Methods
• Mini Review
• Opinion
• Original Research
• Perspective
• Policy and Practice Reviews
• Registered Report
• Review
• Study Protocol
• Systematic Review
• Technology and Code

Keywords: first 1000 days, early childhood, nutritional health, child development, brain development, stunted growth, cognitive development, weakened immunity, breastfeeding benefits, diverse diet, clean water, sanitation access, vaccination coverage, regular checkups, responsiv

Important note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.