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Updated: Jul 13, 2026

Recapitulating Suckling-to-Weaning Transition In Vitro using Fetal Intestinal Organoids
Published on: November 15, 2019
Functional ingredients in the complementary feeding period and long-term effects
Carlo Agostoni1, Enrica Riva, Marcello Giovannini
1Department of Pediatrics, San Paolo Hospital, University of Milan, Milan, Italy.
Micronutrient supplementation during infant complementary feeding shows potential benefits for brain development and visual acuity, but long-term effects and safety require further investigation, especially concerning overconsumption in Western countries.
Area of Science:
- Pediatric Nutrition
- Developmental Biology
- Public Health
Background:
- The complementary feeding period is crucial for infant growth and development.
- Micronutrient supplementation may benefit infants in developing and developed countries, but long-term impacts are under-researched.
- Existing evidence on iron and long-chain polyunsaturated fatty acids (LC-PUFAs) has limitations.
Purpose of the Study:
- To explore the long-term effects of micronutrient supplementation during complementary feeding.
- To investigate the role of specific nutrients like iron and LC-PUFAs on development.
- To examine emerging areas like probiotics, prebiotics, and zinc for immune system effects.
Main Methods:
- Review of observational studies on iron's role in brain development.
- Analysis of randomized trials on LC-PUFAs and visual acuity.
- Identification of research gaps in medium- and long-term effects and safety.
Main Results:
- Iron supplementation may benefit iron-deficient infants' brain development into adulthood.
- LC-PUFAs may improve short-term visual acuity maturation, but long-term links are unproven.
- Probiotics, prebiotics, and zinc show promise for immune system development.
Conclusions:
- Long-term effects of micronutrient supplementation during complementary feeding need extensive exploration.
- Safety concerns exist regarding overconsumption of supplements by young children in Western countries.
- Further research is essential to understand the full impact and safety profile of these interventions.
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