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The Science of Obesity
Obesity is often misunderstood as simply the result of eating too much or exercising too little. In reality, it is a complex, chronic medical condition influenced by biology, genetics, hormones, metabolism, environment, behaviour, sleep, stress, and many other factors.
Understanding the science behind obesity can help replace judgment with compassion and make it easier to identify treatment strategies that support meaningful, long-term improvements in health.
Obesity Is a Chronic Medical Condition
Obesity involves an excess accumulation of body fat that can negatively affect health. Like diabetes, high blood pressure, and other chronic conditions, obesity often requires ongoing management rather than a temporary diet or short-term solution.
The body has powerful systems that regulate hunger, fullness, energy use, and fat storage. These systems developed to protect us from starvation, which means the body may actively resist weight loss by increasing hunger and reducing the amount of energy it uses.
This is one reason losing weight, and maintaining that weight loss, can be much more difficult than it appears.
Watch: The Science of Obesity
Why can weight loss be so difficult to maintain? What roles do hormones, genetics, metabolism, sleep, stress, and the modern food environment play?
In this video, we explore the science of obesity and explain why body weight is influenced by much more than personal choices or willpower. You will learn how the body regulates hunger and energy, why it may resist weight loss, and how lifestyle strategies, medications, meal replacement therapy, and bariatric surgery can support long-term health.