Background: The first 1,000 days of life lay the foundation for health, well-being, learning, and productivity throughout an individual’s lifespan, and also influence the health and well-being of the next generation. This review study was conducted with the aim of comprehensively examining the role of nutrition and environmental factors during the first 1,000 days of life and their impact on long-term health.
Methods: In this review article conducted in 2025, a targeted search was performed in scientific databases including PubMed, Scopus, Google Scholar, SIDS, and Iran Medix using keywords such as “first 1000 days of life,” “early-life nutrition,” “environmental determinants,” and “long-term health outcomes.” Relevant studies published between 2000 and 2025 were identified. After an initial screening of 200 articles and assessment based on inclusion criteria (including originality, methodological rigor, direct relevance to the topic, and availability of full text), 13 key studies with the highest relevance and quality were selected for in-depth analysis and presentation of findings.
Results: The first 1,000 days of life are influenced by maternal nutrition during pregnancy, breastfeeding, complementary feeding, and environmental factors such as air pollution, chemical exposures, and socio-economic conditions. All of these factors affect an individual’s long-term health into adulthood through epigenetic, metabolic, and neurological mechanisms.
Conclusion: The first 1,000 days represent a critical window of opportunity to positively influence a child’s health trajectory by ensuring optimal nutrition and a supportive environment. Emphasizing early investments in this area appears essential as a key strategy for promoting public health and reducing health inequalities. |
- Moore T, Arefadib N, Deery A, West S. The first thousand days: an evidence paper. 2017.
- Juan J, Yang H. Early life 1000 days: Opportunities for preventing adult diseases. Chinese Medical Journal. 2022;135(5):516-8.
- Likhar A, Baghel P, Patil M, Patil MS. Early childhood development and social determinants. Cureus. 2022;14(9).
- Maalouf-Manasseh Z, Oot L, Sethuraman K. Giving children the best start in life: integrating nutrition and early childhood development programming within the first 1000 days. Technical brief Washington, DC: Food and Nutrition Technical Assistance III Project. 2016.
- Khalesi ZB, Bokaie M. The association between pregnancy-specific anxiety and preterm birth: a cohort study. African health sciences. 2018;18(3):569-75.
- Berretta E, Guida E, Forni D, Provenzi L. Glucocorticoid receptor gene (NR3C1) methylation during the first thousand days: Environmental exposures and developmental outcomes. Neuroscience & Biobehavioral Reviews. 2021;125:493-502.
- Khalil S, Sachdev H. Primordial Prevention of Adult Chronic Disease in the “First 1000 Days”: An Indian Perspective. Bulletin of the Nutrition Foundation of India. 2021;42(3).
- Young MF, Ramakrishnan U. Maternal undernutrition before and during pregnancy and offspring health and development. Annals of nutrition & metabolism. 2021;76(Suppl 3):41-53.
- Kheirouri S, Alizadeh M. Maternal dietary diversity during pregnancy and risk of low birth weight in newborns: a systematic review. Public Health Nutrition. 2021;24(14):4671-81.
- Chen L-W, Aubert AM, Shivappa N, Bernard JY, Mensink-Bout SM, Geraghty AA, et al. Maternal dietary quality, inflammatory potential and childhood adiposity: an individual participant data pooled analysis of seven European cohorts in the ALPHABET consortium. BMC medicine. 2021;19(1):33.
- Bokaie M, Gashiri MZ, Khoshbin A, Salimi H. The effectiveness of sexual health counseling based on cognitive-behavioral therapy on sexual satisfaction and inefficient sexual beliefs of primigravida women. Journal of Education and Health Promotion. 2022;11(1):67.
- Farajkhoda T, Ashrafi F, Bokaie M, Zareei Mahmoodabadi H. Online compared to face-to-face sexual intimacy enhancement training program counseling with cognitive-behavioral approach on sexual intimacy in pregnant women. Journal of Sex & Marital Therapy. 2021;47(5):446-59.
- Roozen S, Peters G-JY, Kok G, Townend D, Nijhuis J, Koek G, Curfs L. Systematic literature review on which maternal alcohol behaviours are related to fetal alcohol spectrum disorders (FASD). BMJ open. 2018;8(12):e022578.
- Leth-Møller M, Hulman A, Kampmann U, Hede S, Ovesen PG, Knorr S. Effect of gestational diabetes on fetal growth rate and later overweight in the offspring. The Journal of Clinical Endocrinology & Metabolism. 2025;110(5):1350-7.
- Agosti M, Tandoi F, Morlacchi L, Bossi A. Nutritional and metabolic programming during the first thousand days of life. La Pediatria Medica e Chirurgica. 2017;39(2).
- Le Huërou-Luron I, Blat S, Boudry G. Breast-v. formula-feeding: impacts on the digestive tract and immediate and long-term health effects. Nutrition research reviews. 2010;23(1):23-36.
- Padhani ZA, Das JK, Siddiqui FA, Salam RA, Lassi ZS, Khan DSA, et al. Optimal timing of introduction of complementary feeding: a systematic review and meta-analysis. Nutrition reviews. 2023;81(12):1501-24.
- Ahmad A, Madanijah S, Dwiriani CM, Kolopaking R. Complementary feeding practices and nutritional status of children 6–23 months old: formative study in Aceh, Indonesia. Nutrition Research and Practice. 2018;12(6):512-20.
- Innis SM. Metabolic programming of long‐term outcomes due to fatty acid nutrition in early life. Maternal & child nutrition. 2011;7:112-23.
- Kihal-Talantikite W, Deguen S. Environmental amenities and the fetal and infant health during the first 1000 days of life: a literature review and theoretical contribution. Médecine de la Reproduction. 2020;22(4):287-301.
- Morgan ZE, Bailey MJ, Trifonova DI, Naik NC, Patterson WB, Lurmann FW, et al. Prenatal exposure to ambient air pollution is associated with neurodevelopmental outcomes at 2 years of age. Environmental Health. 2023;22(1):11.
- Antonsen S, Mok PL, Webb RT, Mortensen PB, McGrath JJ, Agerbo E, et al. Exposure to air pollution during childhood and risk of developing schizophrenia: a national cohort study. The Lancet Planetary Health. 2020;4(2):e64-e73.
- Okulicz-Kozaryn K, Segura-García L, Bruguera C, Braddick F, Zin-Sędek M, Gandin C, et al. Reducing the risk of prenatal alcohol exposure and FASD through social services: promising results from the FAR SEAS pilot project. Frontiers in psychiatry. 2023;14:1243904.
- Pascual F. Fracking and Childhood Leukemia: New Evidence Supports Greater Residential Setbacks. Environmental Health Perspectives. 2022;130(9):094002.
- Hackman DA, Farah MJ, Meaney MJ. Socioeconomic status and the brain: mechanistic insights from human and animal research. Nature reviews neuroscience. 2010;11(9):651-9.
- Ciancio A, Behrman J, Kämpfen F, Kohler IV, Maurer J, Mwapasa V, Kohler H-P. Barker's hypothesis among the global poor: positive long-term cardiovascular effects of in utero famine exposure. Demography. 2023;60(6):1747-66.
- Halilagic A, Moschonis G. The effect of growth rate during infancy on the risk of developing obesity in childhood: a systematic literature review. Nutrients. 2021;13(10):3449.
- Prüss-Ustün A, Wolf J, Bartram J, Clasen T, Cumming O, Freeman MC, et al. Burden of disease from inadequate water, sanitation and hygiene for selected adverse health outcomes: an updated analysis with a focus on low-and middle-income countries. International journal of hygiene and environmental health. 2019;222(5):765-77.
- Yang I, Zhang W, Davidson E, Fingerlin T, Kechris K, Dabelea D. Epigenetic marks of in utero exposure to gestational diabetes and childhood adiposity outcomes: the EPOCH study. Diabetic Medicine. 2018;35(5):612-20.
- Öztürk HNO, Türker PF. Fetal programming: could intrauterin life affect health status in adulthood? Obstetrics & gynecology science. 2021;64(6):473-83.
- Borrego-Ruiz A, Borrego JJ. Early-life gut microbiome development and its potential long-term impact on health outcomes. Microbiome Research Reports. 2025;4(2):N/A-N/A.
- Berger PK, Ong ML, Bode L, Belfort MB. Human milk oligosaccharides and infant neurodevelopment: a narrative review. Nutrients. 2023;15(3):719.
- Saavedra JM, Dattilo AM. Nutrition in the first 1000 days of life: society’s greatest opportunity. Early nutrition and long-term health: Elsevier; 2022. p. 3-25.
- Iglesia Altaba I, Larqué E, Mesa MD, Blanco-Carnero JE, Gomez-Llorente C, Rodríguez-Martínez G, Moreno LA. Early nutrition and later excess adiposity during childhood: a narrative review. Hormone Research in Paediatrics. 2022;95(2):112-9.
- Ghosh B, Barman HC, Ghosh S, Habib MM, Mahato J, Dayal L, et al. Air pollution status and attributable health effects across the state of West Bengal, India, during 2016–2021. Environmental Monitoring and Assessment. 2024;196(2):165.
- Alharbi HF, Algonaiman R, Alduwayghiri R, Aljutaily T, Algheshairy RM, Almutairi AS, et al. Exposure to bisphenol A substitutes, bisphenol S and bisphenol F, and its association with developing obesity and diabetes mellitus: a narrative review. International Journal of Environmental Research and Public Health. 2022;19(23):15918.
- Shonkoff JP, Slopen N, Williams DR. Early childhood adversity, toxic stress, and the impacts of racism on the foundations of health. Annual review of public health. 2021;42(1):115-34.
- Wong K, Isaac DM, Wine E. Growth delay in inflammatory bowel diseases: significance, causes, and management. Digestive Diseases and Sciences. 2021;66(4):954-64.
- Afolaranmi AO. Social media and marital choices: Its implications on contemporary marriage. IGWEBUIKE: African Journal of Arts and Humanities. 2020;6(4).
- Maitre L, De Bont J, Casas M, Robinson O, Aasvang GM, Agier L, et al. Human Early Life Exposome (HELIX) study: a European population-based exposome cohort. BMJ open. 2018;8(9):e021311.
- Maitre L, Bustamante M, Hernández-Ferrer C, Thiel D, Lau C, Siskos A, et al. Multi-omics signatures of the human early life exposome. Nat Commun 13: 7024. 2022.
- Stevens DR, Bommarito PA, Keil AP, McElrath TF, Trasande L, Barrett ES, et al. Urinary phthalate metabolite mixtures in pregnancy and fetal growth: findings from the infant development and the environment study. Environment international. 2022;163:107235.
|