BSc (Hons), RNMH, NMP

Advanced nurse practitioner

Sometimes motivation isn’t a holiday photograph. It’s a conversation with your GP that lands harder than you expected.

Perhaps your blood pressure was high, your HbA1c had moved into the prediabetes range, or your cholesterol was raised. Maybe you’ve developed sleep apnoea or breathlessness, or your family history is starting to feel relevant. Men can spend years thinking they should probably lose weight, until something about their health gives them a reason to take it more seriously.

A wake-up call is useful if it makes you act. It isn’t a verdict on your future health.

This article explains what to do next, how to work out what you can change, whether medical weight loss treatment might be appropriate, and how to measure progress beyond kilograms.

Why has your doctor advised you to lose weight?
Step one: understand your numbers
Step two: decide what you can change
Step three: consider medical weight loss treatment
Step four: track health, not just weight
Questions to ask your GP

Why has your doctor advised you to lose weight?

If your GP has advised you to lose weight, it’s usually because they’re considering how your weight may be affecting your health now, or your risk of developing health problems in the future.

Where you carry weight matters too. Carrying more fat around your waist is linked with a higher risk of several health conditions.

Living with overweight or obesity is associated with a greater risk of high blood pressure, type 2 diabetes, heart disease, stroke, fatty liver disease, and osteoarthritis. It may also contribute to breathlessness, fatigue, joint pain, reduced mobility, and snoring [1].

Weight isn’t the only factor involved in these conditions, though. Genetics, age, smoking, alcohol, sleep, medication, activity, and other health problems can all contribute. Losing weight may reduce your risk, or improve some symptoms, but other causes may still need to be investigated and treated.

Step one: understand your numbers

Ask your GP which results prompted the conversation and what they’d like to see improve.

Blood pressure

Blood pressure measures the force of blood against your artery walls. A reading is usually considered high at 140/90 mmHg or above in a clinic, or 135/85 mmHg or above at home. One raised reading may need to be confirmed with home measurements or a 24-hour monitor.

You can have high blood pressure, also known as hypertension, and feel completely well. Left untreated, though, it can gradually damage the heart, blood vessels, brain, kidneys, and eyes. Losing weight may help bring it down, as can regular exercise, reducing salt intake, moderating alcohol intake, quitting smoking, and taking prescribed medication as needed.

HbA1c and prediabetes

HbA1c reflects your average blood glucose over the previous two to three months. Doctors usually class a result of 42–47 mmol/mol as non-diabetic hyperglycaemia, often called prediabetes. A result of 48 mmol/mol or higher is in the diabetes range. You may need a blood test to confirm if you have no symptoms [2].

Prediabetes doesn’t mean type 2 diabetes is inevitable. Small, sustainable changes can make a real difference. Eating well, moving more, and maintaining a healthy weight can help lower your blood sugar and reduce your risk.

Cholesterol and cardiovascular risk

A cholesterol test may show total cholesterol, HDL, non-HDL, LDL, and triglyceride levels. Your GP will consider these alongside your blood pressure, glucose levels, age, medical history, and family history when assessing the risk of cardiovascular disease.

They may use a calculator to estimate your likelihood of having a heart attack or stroke within the next ten years. Ask which factors are driving your result. You can’t change your age or genes, but blood pressure, cholesterol, smoking, physical activity, glucose control, and waist size can all be modified.

Sleep apnoea and breathlessness

Obstructive sleep apnoea causes breathing to stop and restart during sleep.

Signs include:

Loud snoring
Gasping
Morning headaches
Poor concentration
Daytime sleepiness.

Weight loss may improve symptoms, but many people also need treatment such as continuous positive airway pressure (CPAP) [3].

Breathlessness can be related to weight or fitness, but it can also have heart, lung, or blood-related causes. New, unexplained, or worsening breathlessness should be assessed rather than automatically blamed on your size.

Don’t just reduce your health to BMI

Body mass index, or BMI, is a useful screening measure, but it doesn’t directly measure body fat, distinguish fat from muscle, or show where fat is stored.

Waist-to-height ratio can provide additional information about abdominal fat in adults with a BMI below 35 kg/m². NICE advises keeping your waist below half your height as a straightforward guide [4].

Step two: decide what you can change

You don’t need a crash diet, and you don’t need to become “slim” before your health begins to benefit. The NHS states that losing around 5–10% of your starting weight can improve health [1]. For a man weighing 100 kg, that’s 5–10 kg.

Small changes can make a difference:

Eating regular meals based around protein, vegetables, fruit, higher-fibre carbohydrates, and unsaturated fats
Identifying easy-to-miss calories from alcohol, sugary drinks, snacks, and large portions
Building up walking, cycling, swimming, or another form of aerobic activity
Including resistance exercise to help preserve muscle during weight loss
Addressing poor sleep or possible sleep apnoea
Getting support with nicotine or alcohol where needed

Choose changes that are sustainable and can survive work, weekends, holidays, and difficult days. A moderate plan you can maintain is more useful than a strict one you abandon after two weeks.

Step three: consider medical weight loss treatment

For eligible men, prescribed weight loss medication may make sustained weight reduction more achievable. Available treatments include tablets and injections that affect appetite and fullness.

Suitability depends on your BMI, weight-related conditions, medical history, current medication, previous weight-loss attempts, and possible contraindications.

Weight regulation involves biological signals as well as behaviour. One influential study found that changes in several appetite-related hormones, along with increased hunger, persisted a year after participants lost weight through a very-low-energy diet [5].

Treatment should still form part of a monitored plan that considers nutrition, activity, side effects, and muscle preservation. It also doesn’t automatically replace blood pressure tablets, statins, or diabetes treatment.

Never reduce or stop prescribed treatment without speaking to the clinician responsible for your care.

Step four: track health, not just weight

The scales are useful, but they don’t show the whole result. Depending on why your doctor recommended weight loss, you might also monitor:

Waist measurement
Blood pressure
HbA1c or blood glucose
Cholesterol and triglycerides
Sleep quality
Breathlessness, mobility, and fitness
Strength and muscle maintenance
Liver and kidney blood results

Questions to ask your GP

If the original conversation felt rushed, arrange a follow-up and consider asking:

Which result or symptom concerns you most?
Does the result need confirming?
What level of weight loss could make a meaningful difference?
Should I monitor my blood pressure at home?
When should my blood tests be repeated?
Do I need an assessment for sleep apnoea or another cause of breathlessness?
Would a dietitian or weight management programme be appropriate?
Am I a suitable candidate for prescribed weight loss medication?
How will my existing medicines be reviewed if my health markers improve?
Which symptoms should prompt me to seek urgent help?

Being advised to lose weight may not be the conversation you wanted, especially if it came out of the blue. Still, it’s an opportunity to ask what’s changed, what improvement would make a difference, and what support is available. The aim isn’t to punish yourself; it’s to find a realistic way forward.

Discover if you're eligible for weight loss treatment.

References

NHS (2026) Overweight and obesity in adults. (Accessed: 12 September 2026).
Diabetes UK (n.d.) Diagnostic criteria for diabetes. (Accessed: 12 September 2026).
NHS (2026b) Sleep apnoea. (Accessed: 12 September 2026).
National Institute for Health and Care Excellence (2025) Overweight and obesity management. NICE guideline NG246. (Accessed: 15 September 2026).
Sumithran, P., Prendergast, L.A., Delbridge, E., Purcell, K., Shulkes, A., Kriketos, A. and Proietto, J. (2011) Long-term persistence of hormonal adaptations to weight loss. New England Journal of Medicine, 365(17), pp. 1597–1604.