Obesity in Men: Diagnosis Criteria, Health Risks & Medical Weight Loss Treatments | Doctor-Reviewed Guide

“My health checkup said I have metabolic syndrome.” “No matter how many times I diet, the weight comes back.” Many busy men carry these concerns but leave them unaddressed because of work pressures.
However, untreated obesity is a medical issue that can lead to serious complications such as type 2 diabetes, hypertension, heart disease, and sleep apnea.

In this doctor-reviewed guide, we explain everything from the definition and diagnostic criteria of obesity, to the most common causes in men and the associated health risks, all the way through to the latest medical weight loss treatments including GLP-1 receptor agonists. If you feel you have reached the limits of self-directed dieting, this article is for you.

What is Obesity? BMI and Visceral Fat Basics

“Obesity” and “obesity disease” are similar but distinct concepts. A BMI (Body Mass Index) of 25 or higher is called obesity, but obesity disease is a more specific medical diagnosis.
According to the definition of the Japan Society for the Study of Obesity, obesity disease is a state in which obesity is accompanied by health complications, or in which visceral fat accumulation has reached a level requiring medical intervention.

How to Calculate BMI and the Obesity Classification

Visceral Fat vs. Subcutaneous Fat Obesity

Particularly common in men is visceral fat type obesity (apple-shaped). Fat accumulates around the internal organs, producing the typical potbelly appearance.
Visceral fat is more likely than subcutaneous fat to cause metabolic abnormalities and inflammation, significantly raising the risk of diabetes, hypertension, and heart disease. In men, a waist circumference of 85 cm or more meets the criteria for metabolic syndrome.

4 Reasons Why Men Tend to Gain Weight

1. Lack of Exercise and Lower Basal Metabolism

As we age, muscle mass decreases and basal metabolic rate drops. Compared with a person in their 20s, basal metabolism in the 40s is said to fall by about 10-15 percent.
With desk-bound lifestyles, calorie expenditure becomes very low, and the body more easily stores excess energy as fat even when eating the same amount as before.

2. Poor Diet and Overeating

Busy professionals often rely on eating out, convenience store meals, and late-night meals. Continued intake of high-calorie, high-fat, high-sugar foods leads to body fat storage.
Binge eating and eating quickly also cause rapid blood sugar spikes that promote fat synthesis.

3. Sleep Deprivation and Stress

Lack of sleep increases ghrelin (hunger hormone) and decreases leptin (satiety hormone). The result is heightened appetite, especially for sugary and fatty foods.
Chronic stress also raises cortisol, which is another factor that promotes visceral fat accumulation.

4. Drinking Habits

Alcohol itself is high in calories (1g = 7 kcal), and the high-fat and high-salt snacks that accompany drinking further contribute to weight gain. The idea that alcohol calories do not count is a myth, and daily drinking is a frequent driver of visceral fat accumulation.

Health Risks of Obesity

Untreated obesity can lead to a variety of lifestyle-related diseases and complications. Addressing the issue early is the best way to prevent serious illness in the future.

Diagnostic Criteria for Obesity

A diagnosis of obesity disease is made by a physician based on the following examinations and measurements. Although weight alone is often thought to be the basis, visceral fat volume and blood data are also important indicators.

Medical Treatments (GLP-1 and Pharmacotherapy)

Willpower alone is not enough. In reality, obesity is strongly influenced by genetic and hormonal factors, and turning to medical support is nothing to be ashamed of.
At Mens Care Clinic, we support weight reduction through the following medical approaches.

GLP-1 Receptor Agonists (the Most Notable Medical Weight Loss Option)

GLP-1 (glucagon-like peptide-1) is a hormone secreted by the intestines after meals that suppresses appetite, slows gastric emptying, and stimulates insulin secretion.
Medications that mimic this action are called GLP-1 receptor agonists, and overseas clinical trials have reported an average weight reduction of 15-17 percent.

Other Pharmacotherapy and Medical Support

Medical Weight Loss Process (4 Steps)

Many people feel that going to a clinic is intimidating, but our clinic also offers online consultations, allowing you to begin medical weight loss from the comfort of home. Here is the process.

Lifestyle Improvement Tips

Combining lifestyle improvements with medical weight loss leads to greater results and longer-term maintenance. Below are practical tips that even busy professionals can apply.

Frequently Asked Questions (FAQ)

Summary

Here is a recap of the key points covered in this article.

Obesity is not a matter of weak willpower. It results from a combination of factors including environment and hormonal balance.
Please feel free to begin with a consultation and a body composition measurement.

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Medical Reviewer: Mens Care Clinic Physician
This article has been prepared under the supervision of medical professionals. Information is current as of the date of publication; please contact our clinic for the latest details.

*This article is for general informational purposes regarding obesity and does not guarantee specific treatment outcomes. Individual results vary; please consult your physician for details.