In the UK, around one in four adults lives with obesity. The rise seen in the 2000s has slowed, but it has not reversed. So where do you start if you really want to make changes?

A useful first step is to stop seeing obesity as simply a lack of willpower. It is a chronic disease, and current data suggest it develops at the intersection of several factors — genetics, sleep, stress, deprivation and the food environment. In other words, it is not just a matter of personal discipline.

What we know, and what we do not yet know

We know how to identify it: body mass index (BMI) remains the measure used in clinical settings. We also know that the complications are very real, from type 2 diabetes to sleep apnoea.

What we understand less well is why some people respond quickly to treatment and others much less so. Hence the value of tailored support, rather than the same protocol for everyone.

Moving, eating, sleeping: the habits that matter

In practice, there is no approach that shifts the kilos without sustained effort. The approaches that last are modest: more vegetables and pulses, adjusted portions, fewer sugary drinks, and above all no extreme diets.

Young woman cycling along a tree-lined path in a park in the late afternoon
Moving a little each day, at your own pace, rather than an extreme effort

On the movement side, official recommendations aim for at least thirty minutes of moderate activity a day: walking, cycling, swimming. And if sport is not your thing? What matters is moving a little every day, at your own pace. Sleep counts too: some data suggest that a lack of sleep may be associated with weight gain.

Medication for obesity

The landscape has changed. Sibutramine, sold in the UK as Reductil, was withdrawn from the market in 2010. Today, medicines in the incretin class are prescribed to some people, on the decision of a healthcare professional, under strict conditions and with close monitoring.

Young woman holding an injection pen in a bright bathroom in the morning
New classes of treatment now shape obesity care

These treatments are not without risk: digestive side effects are common, and weight often returns after stopping. An older medicine remains modestly effective.

Slimming supplements sold online have not been shown to have robust evidence of effectiveness. Before considering any treatment, talk to a healthcare professional: the decision depends on your history and medical background.

Obesity surgery

It is for specific situations: a BMI often above 40, or from 35 with associated conditions, after medical treatment has not worked. Sleeve gastrectomy and gastric bypass are the most common procedures; gastric banding is now rare. All require lifelong follow-up.

Preventing early, without blame

In children, habits form quickly. School meals, PE lessons, access to water and good-quality food matter as much as individual messages. And telling a child they are 'lazy' does not help: stigma is associated with more difficult eating behaviours.

Costs

  • GP appointment: free on the NHS. Private GP appointments usually cost around £50–£100.
  • Registered dietitian: an NHS referral is free; private sessions often cost £50–£100.
  • Sports club or supervised activity: £20–£50 per month, sometimes less through social prescribing or exercise referral schemes.
  • Talking therapy: free through NHS talking therapies; private therapy often costs £50–£100 per session.

Prices vary by city, practitioner and length of follow-up. Ask for the price before your appointment and check what is covered by the NHS or your private health insurance.

Sources

Food supplements do not replace a varied, balanced diet and a healthy lifestyle.