Metabolic Health Phenotypes in Childhood Obesity

Childhood obesity exhibits marked heterogeneity in cardiometabolic risk. While all affected children share excess adiposity, a subset remains free of dyslipidaemia, hypertension and hyperglycaemia—termed metabolically healthy obesity (MHO)—whereas others exhibit one or more of these abnormalities and are classified as metabolically unhealthy obesity (MUO). The prevalence of MHO varies widely with definitions, age, sex and ethnicity. Key determinants of the MHO phenotype include preserved insulin sensitivity, lower visceral fat deposition, favourable adipokine secretion and reduced inflammatory activity within adipose tissue. Genetic predisposition, nutrient intake patterns and physical activity further modulate metabolic status. Longitudinal data indicate that MHO is often transient, with many children progressing to MUO in the absence of targeted interventions. Distinguishing these phenotypes informs risk stratification, underpins tailored prevention strategies and guides resource allocation in paediatric practice globally.

Research from Nature Portfolio

Recent studies have examined the relationship between dietary nutrient patterns and metabolic health in overweight and obese adolescents. In a cross-sectional analysis, three distinct patterns—characterised by high minerals and vitamins, high carbohydrate or high fat and sodium intake—were identified. Greater adherence to the high fat and sodium pattern was associated with a twofold to threefold increase in odds of an unhealthy metabolic profile, particularly among boys and those with established obesity. These findings underscore the role of specific nutrient combinations in modulating insulin sensitivity and lipid profiles during adolescence, suggesting that reduction of saturated fats, trans fats and sodium may mitigate progression to MUO.

Metabolic Health Phenotypes in Childhood Obesity publication trend

The graph below shows the total number of articles in metabolic health phenotypes in childhood obesity across all publications each year (not limited to Nature Index journals).

Technical terms

Metabolically Healthy Obesity (MHO): A phenotype of obesity characterised by the absence of traditional cardiometabolic risk factors despite excess body fat.

Metabolically Unhealthy Obesity (MUO): Obesity accompanied by one or more risk factors such as hypertension, dyslipidaemia, insulin resistance or hyperglycaemia.

Insulin Resistance: A state in which peripheral tissues respond inadequately to insulin, often assessed by the Homeostasis Model Assessment (HOMA-IR).

Triglyceride-Glucose Index: A surrogate marker combining fasting triglyceride and glucose concentrations to estimate insulin resistance.

Alternative Healthy Eating Index (AHEI): A dietary score reflecting adherence to food patterns associated with reduced cardiometabolic risk.

References

1. Triglyceride glucose index, pediatric NAFLD fibrosis index, and triglyceride-to-high-density lipoprotein cholesterol ratio are the most predictive markers of the metabolically unhealthy phenotype in overweight/obese adolescent boys. Frontiers in Endocrinology (2023).
2. Nutrient patterns in relation to metabolic health status in overweight and obese adolescents. Scientific Reports (2023).
3. Lifestyle intervention improves cardiometabolic profiles among children with metabolically healthy and metabolically unhealthy obesity. Diabetology & Metabolic Syndrome (2024).
4. Association between alternative healthy eating index (AHEI) with metabolic health status in adolescents with overweight and obesity. BMC Public Health (2024).