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Relationship between regional fat distribution and insulin resistance
1Division of Endocrinology and Metabolic Diseases, University of Verona Medical School, Italy. malmetab@borgotrento.univr.it
Summary
Visceral fat strongly predicts insulin resistance in obese individuals, but not in normal-weight people. This suggests a threshold effect where excess visceral fat, independent of measurement method, impacts glucose metabolism.
Area of Science:
- Metabolic health
- Obesity research
- Endocrinology
Background:
- Visceral fat accumulation is linked to metabolic dysfunction.
- The relationship between visceral fat and insulin resistance may depend on overall body weight.
- Hepatic glucose production and peripheral glucose disposal are key components of glucose homeostasis.
Purpose of the Study:
- To review the association between visceral fat and insulin resistance.
- To explore if this association is weight-dependent.
- To examine the impact of visceral fat on glucose metabolism.
Main Methods:
- Review of epidemiological studies.
- Analysis of clinical trial data.
- Inclusion of interventional (weight loss) studies.
- Examination of data from identical twin studies.
Main Results:
- Visceral fat is a significant predictor of insulin resistance in obese individuals.
- This predictive relationship is not observed in normal-weight individuals.
- Increased visceral fat is associated with higher hepatic glucose production and impaired glucose disposal, irrespective of the insulin sensitivity assessment method.
Conclusions:
- A threshold of visceral fat may be necessary for it to predict insulin resistance.
- Visceral fat's adverse effects on glucose metabolism are evident in obese populations.
- Understanding this threshold is crucial for metabolic health interventions.