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Review
. 2024 Nov;20(11):633-646.
doi: 10.1038/s41574-024-01008-5. Epub 2024 Jun 27.

Metabolically healthy obesity: from epidemiology and mechanisms to clinical implications

Matthias B Schulze  1   2   3 , Norbert Stefan  4   5   6
Affiliations
Review

Metabolically healthy obesity: from epidemiology and mechanisms to clinical implications

Matthias B Schulze et al. Nat Rev Endocrinol. 2024 Nov.

Abstract

The concept of metabolic health, particularly in obesity, has attracted a lot of attention in the scientific community, and is being increasingly used to determine the risk of cardiovascular diseases and diabetes mellitus-related complications. This Review assesses the current understanding of metabolically healthy obesity (MHO). First, we present the historical evolution of the concept. Second, we discuss the evidence for and against its existence, the usage of different definitions of MHO over the years and the efforts made to provide novel definitions of MHO. Third, we highlight epidemiological data with regard to cardiovascular risk in MHO, which is estimated to be moderately elevated using widely used definitions of MHO when compared with individuals with metabolically healthy normal weight, but potentially not elevated using a novel definition of MHO. Fourth, we discuss novel findings about the physiological mechanisms involved in MHO and how such knowledge helps to identify and characterize both people with MHO and those with metabolically unhealthy normal weight. Finally, we address how the concept of MHO can be used for risk stratification and treatment in clinical practice.

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