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Person/s shown are models, not actual patient.
Obesity is often misunderstood as a simple result of eating too much or moving too little. It is a complex medical condition influenced by biology, hormones, genetics, environment, and behavior.
Understanding the science behind obesity can help explain why managing weight is challenging, and why support matters.
Obesity is a medical condition characterized by an excess amount of body fat that can affect overall health. It is recognized as a chronic disease and is associated with an increased risk of several health conditions.
Obesity does not have a single cause. It is influenced by a combination of genetic, environmental, and behavioural factors that can affect how the body gains and stores weight.
The causes of obesity are complex and can vary from person to person:
Biology and genetics
Small genetic differences can influence how the body stores fat, regulates appetite, and uses energy. Some people may be biologically more prone to weight gain than others.
Hormones
Hormones play a key role in appetite control, fat storage, and metabolism. Changes in hormonal balance including those related to stress, sleep, or life stages can make weight management more difficult.
Metabolism
Metabolism determines how the body converts food into energy. In people living with obesity, metabolic processes may adapt over time, making weight loss harder to maintain.
Environment and lifestyle
Daily routines, food availability, work patterns, and physical activity levels all influence weight. These factors often interact with biology rather than acting alone.
Stress, sleep, and medications
Chronic stress, poor sleep quality, and certain medications can affect hunger hormones and energy balance, contributing to weight gain over time.
Obesity develops over time due to these overlapping factors. This is why managing weight can be challenging and often requires a personalised, long-term approach.
To determine if you might be living with obesity, it is important to consult a doctor for an accurate assessment. One commonly used screening tool is the Body Mass Index (BMI).
BMI is a simple calculation based on your height and weight. It helps classify weight status in adults and gives an initial indication of whether a person may be underweight, within a healthy range, overweight, or living with obesity.
BMI is a useful starting point, but it does not provide a complete picture of health. A healthcare professional may consider additional factors when assessing obesity.
This is as per the ESI Clinical Practice Guideline Recommendation.
Obesity is considered a long‑term condition rather than a short‑term problem.
This means:
• Weight management often requires ongoing care
• Setbacks or weight regain are common
• Long‑term strategies are more effective than quick fixes
Living with obesity can increase the risk of several health conditions, including heart disease, type 2 diabetes, joint problems, liver disease, and certain cancers. It can also affect mental and emotional well‑being, energy levels, and quality of life.
Learning about the science behind obesity can help reduce blame and frustration. It can also make it easier to seek the right kind of support and set realistic expectations for weight management.
Support is available and managing obesity does not have to be done alone.
