Obesity Is a Chronic Disease — Not a Lifestyle Choice

For decades, excess weight was widely treated as a personal failing — a consequence of poor choices and insufficient effort. This view is not supported by the evidence. In 2020, the World Obesity Federation formally classified obesity as a chronic, relapsing disease. The British Medical Association, the Royal College of Physicians, and the NHS have all adopted similar positions.

What makes obesity a disease?

A disease is a condition that impairs normal function and has identifiable biological mechanisms. Obesity meets both criteria. It involves dysregulation of the hormonal systems that control appetite and energy balance — including leptin, ghrelin, insulin, and GLP-1 — and is associated with significant morbidity and mortality. It also has a strong genetic component: studies of twins suggest that genetics account for 40–70% of the variation in body weight between individuals.

Why does this matter for treatment?

Classifying obesity as a disease changes the treatment framework. It means that telling someone to "eat less and move more" is as inadequate as telling someone with depression to "cheer up." It means that weight regain after treatment is a feature of the disease — not evidence of failure — and that long-term management is required, just as it is for hypertension or type 2 diabetes.

It also means that evidence-based medical treatments are appropriate and necessary for many people — not a shortcut or a sign of weakness.

The role of stigma

Weight stigma — negative attitudes and discrimination based on body weight — is widespread in healthcare settings and in wider society. Research shows that stigma makes outcomes worse: it increases stress, reduces engagement with healthcare, and contributes to the psychological burden of living with obesity. A compassionate, non-judgmental approach is not just ethically right — it is clinically important.

What does this mean for you?

If you have struggled with your weight despite genuine effort, the problem is not your character. It is a complex biological condition that responds to the right clinical support.

At Weight Loss Wales, we treat obesity as the medical condition it is. Start your consultation today.