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What is Obesity?
Medically reviewed by Selma Mehr · Specialist doctor in family medicine
Obesity is a long-term (chronic) medical condition where the body has too much fat stored. It is not just about appearance — obesity can affect your health in many different ways. Doctors today recognize obesity as a complex disease, influenced by many factors such as genetics, diet, physical activity, stress, sleep, and even certain medications.
How is Obesity Measured?
The most common tool is the Body Mass Index (BMI).
BMI is calculated by dividing your weight (in kilograms) by your height (in meters squared).
For adults:
A BMI of 25 or higher is considered overweight.
A BMI of 30 or higher is considered obesity.
Other measures, such as waist circumference, can also give important information about health risks, since fat stored around the waist can increase the risk of certain diseases.
Why Does Obesity Matter?
Carrying extra weight, especially over a long time, increases the risk of:
Type 2 diabetes
High blood pressure and heart disease
Stroke
Certain types of cancer
Liver and kidney problems
Joint and mobility issues
The Good News
Even small amounts of weight loss — as little as 5–10% of your body weight — can improve blood sugar, blood pressure, and cholesterol levels, lowering the risk of serious disease.
Treatment and Support
Obesity is not simply about willpower. It is a complex condition that often requires professional help. Safe and effective treatment options include:
Guidance on nutrition and physical activity
Support for sleep and stress management
Medical treatments (including medications, if needed)
Long-term follow-up and care
Key Message: Obesity is a treatable medical condition. With the right support, many people succeed in reaching healthier weight levels and improving their quality of life. You are not alone — help is available.
Sources
About the author
Selma Mehr
Specialist doctor in family medicine
As a specialist in general medicine with eight years of experience, I have broad expertise in preventive healthcare and treatment of chronic diseases. My philosophy is to focus on a holistic approach to weight loss and health, as it's more than just diet and exercise. I work with patients to improve their metabolic control, thereby preventing diseases such as type 2 diabetes, high blood pressure, high blood lipids, and cardiovascular diseases.
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