Metabolically Healthy Obesity Is a Misnomer: Components of the Metabolic Syndrome Linearly Increase with BMI as a Function of Age and Gender

Yonit Marcus, Elad Segev, Gabi Shefer, David Eilam*, Galina Shenkerman, Assaf Buch, Shani Shenhar-Tsarfaty, David Zeltser, Itzhak Shapira, Shlomo Berliner, Ori Rogowski

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Objectives: We aimed to examine the relationships between body mass index (BMI) and metabolic syndrome (MS) components as a function of age and gender across weight categories. Methods: This cross-sectional study included 19,328 subjects who participated in a health-screening program. We analyzed 14,093 apparently healthy subjects with a BMI ≥ 18.5 kg/m2 (ranging from 18.5 to 46 kg/m2). Results: At a BMI of 18.5 kg/m2, 16% of subjects had one or more MS components (MS ≥ 1). The number of MS components increased linearly with BMI. The most prevalent components for MS1-4 were hypertension (in men) and increased waist circumference (in women). Among 6391 non-obese subjects with MS = 0, there was a linear increase in blood pressure, glucose, and triglycerides, as well as a decline in high-density lipoprotein cholesterol, as BMI increased. In 2087 subjects with a BMI ≥ 30 kg/m2, a true normometabolic state (MS = 0) was observed in only 7.5%, declining to less than 1% at a BMI ≥ 36 kg/m2 (ATP criteria). Women were metabolically protected relative to men between the ages of 30 and 50 years. Conclusions: (A) MS components increase linearly with BMI from the lowest normal BMI and continue to increase with age and BMI; (B) metabolically healthy obesity is rare in subjects with a high BMI and declines with age; (C) hypertension is the most common component in men; and (D) in women, MS components are seen at older ages than in men for the same BMI. Metabolic health declines with age and BMI in nearly all subjects with obesity.

Original languageEnglish
Article number719
JournalBiology
Volume12
Issue number5
DOIs
StatePublished - May 2023

Funding

FundersFunder number
Sagol Fund for the Metabolic Syndrome Research Center

    Keywords

    • hypertension
    • metabolic syndrome
    • metabolically healthy obesity
    • normometabolic obesity
    • obesity

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