Obese SGA children had lower fasting and post-glucose ghrelin levels with blunted suppression, with ghrelin dynamics more closely tied to insulin sensitivity than to adiposity itself.
Insulin sensitivity, not fatGhrelin dynamics in SGA children were more closely linked to insulin resistance than to adiposity measures
What the researchers found
Obese SGA children showed lower fasting/post-load ghrelin and smaller suppression. Fasting ghrelin and its suppression were independently associated with HOMA-IR, while post-load ghrelin was determined by post-load insulin.
Why it matters
Understanding how ghrelin signaling is disrupted in children at metabolic risk could inform early intervention strategies to prevent childhood obesity and its consequences.
How the study worked
Cross-sectional study of 98 prepubertal SGA children (ages 5-9), with anthropometry, blood pressure, fasting lipids, glucose, insulin, and ghrelin at baseline and 120 min during OGTT, with regression analyses.
What this study cannot tell us
Cross-sectional design; cannot determine causation. Single ghrelin measurement timepoint (120 min). Total ghrelin measured (not acyl vs desacyl). Moderate sample size.
How to read the evidence
Well-designed cross-sectional study with appropriate statistical analysis. Moderate sample size with clear findings, though causation cannot be determined.
When this study was published
Published in 2025.
The bigger picture
Ghrelin dysregulation in SGA children adds to evidence that early-life growth patterns program metabolic peptide signaling, potentially creating lifelong obesity vulnerability.
Questions still open
- Could ghrelin-targeted interventions prevent obesity in SGA children?
- Does the ghrelin blunting in SGA children persist into adulthood?
- Would GLP-1 drugs interact differently with the altered ghrelin signaling in SGA children?
Common questions
What is ghrelin and why does it matter for children's weight?
Does being born small affect metabolism long-term?
Read the original research
Effect of Oral Glucose Administration on Ghrelin Levels in Normal-Height Prepubertal Children Born Small for Gestational Age (SGA).
International journal of molecular sciences, 27(4)
Citation
Fedorczak, Anna; Smalczewska, Paula; Grobelna, Magdalena; Szałapska, Małgorzata; Zygmunt, Arkadiusz; Stawerska, Renata. (2026). Effect of Oral Glucose Administration on Ghrelin Levels in Normal-Height Prepubertal Children Born Small for Gestational Age (SGA).. International journal of molecular sciences, 27(4). https://doi.org/10.3390/ijms27041791