Environmental Forces that Shape Early Development: What We Know and Still Need to Know

Area of Science:

• Environmental epigenetics
• Childhood development
• Nutritional science

Background:

• Gene function is regulated by environmental factors through epigenetics, collectively termed the exposome.
• Maternal health during pregnancy and caregiver influences post-birth shape a child's early life exposures.
• Early life nutrient imbalances and dietary patterns can establish lifelong chronic disease risk.

Purpose of the Study:

• To highlight the critical role of early life environmental exposures in shaping health outcomes.
• To emphasize the need for research into caregiver-infant feeding relationships and their impact on food acceptance.
• To advocate for novel research methodologies that capture the complexity of environment-gene interactions.

Main Methods:

• Review of existing literature on epigenetics, the exposome, and early childhood development.
• Discussion of the limitations of traditional clinical trials in nutrition for studying complex interactions.
• Introduction of novel technologies and statistical approaches for gathering broad exposure data.

Main Results:

• Maternal factors (diet, weight, activity) influence fetal growth and infant metabolism.
• The critical window from birth to age 3 is highly susceptible to nutrient imbalances.
• Caregiver-infant feeding dynamics directly shape dietary patterns with lifelong consequences.

Conclusions:

• Understanding the exposome is essential for comprehending health beyond genetics.
• Research must address the interconnectedness of environment, epigenetics, and early life exposures.
• Innovative approaches are needed to study individual genetic makeup alongside unique environmental experiences.