Am I eligible for medical weight loss treatment? How a UK clinician decides

Eligibility for medical weight loss treatment in the UK is a clinical decision, not a form you pass. A clinician weighs your BMI (body mass index, your weight set against your height), your health conditions, your medical history and the medicines you already take. In a good service, a blood test is part of that picture.

In England in 2024, 70% of men were overweight or living with obesity. [15] Meeting a BMI threshold is where the assessment starts, not where it ends.

This guide sets out the criteria UK clinicians work to and who is not suitable. It covers what is checked before a decision, how the check works at home, and what happens if the answer is no.

What does "eligible" mean?

Eligible means a clinician has assessed you and decided that treatment is clinically suitable. Nobody is eligible by BMI alone, and no online form can make the decision for a prescriber.

Three layers sit behind that decision. The medicines licence, issued by the Medicines and Healthcare products Regulatory Agency (MHRA), sets the population the regulator has assessed the medicine for. The National Institute for Health and Care Excellence (NICE) sets the criteria for NHS funding, which are narrower. [3]

The pharmacy regulator sets the checks a prescriber must carry out before supplying anything. [8] In the UK, prescription medicines for weight management are licensed for adults who meet the criteria below. [1] [2] The MHRA states that it has not assessed their safety and effectiveness when used outside the licensed population. [3]

What are the BMI criteria in the UK?

In the UK, the licence covers adults with a BMI of 30 or more, or 27 to under 30 with at least one weight-related health condition. [1] [2] NHS funding criteria are higher. Which set applies depends on the route you take.

BMI is body mass index: your weight in kilograms divided by your height in metres squared. The NHS BMI calculator works it out from two measurements. [7] The sources use "comorbidity" for a weight-related health condition.

UK eligibility criteria by route (population thresholds, each cited)

Route	Criteria	Source
The UK licence (the population the regulator has assessed)	Adults with an initial BMI of 30 or more, or 27 to under 30 with at least one weight-related comorbidity, alongside a reduced-calorie diet and increased physical activity	Product information, section 4.1 [1] [2]
NHS specialist weight management service	At least one weight-related comorbidity and a BMI of 35 or more, or 30 to 34.9 with the criteria for specialist referral met; treatment for a maximum of 2 years	NICE TA875, recommendation 1.1 [4]
NHS, NICE appraisal TA1026 (December 2024)	An initial BMI of 35 or more and at least one weight-related comorbidity, introduced in phases	NICE TA1026, recommendation 1.1 [5]
NHS GP practice, current phase	Four of the five listed weight-related health problems and a BMI of 35 or more, adjusted for ethnicity	NHS England [6]

Private prescribers are expected to work within UK national prescribing guidance. [8] The pharmacy regulator's 2026 review describes the private route as the usual way people access these medicines, and records concerns where a person "did not meet the licensed indication criteria". [9]

Lower thresholds apply to some ethnic backgrounds. NICE classifies obesity from BMI 27.5 for people with a South Asian, Chinese, other Asian, Middle Eastern, Black African or African-Caribbean background, because cardiometabolic risk occurs at a lower BMI. [7] NICE usually reduces its NHS treatment thresholds by 2.5 for the same groups. [4] [5]

BMI has limits, and clinicians know them. NICE says to interpret it with caution in adults with high muscle mass. [7] Below BMI 35, NICE also uses waist-to-height ratio (your waist measurement divided by your height) alongside BMI as a practical estimate of fat around the organs. [7]

The rule of thumb is to keep your waist to less than half your height. [7] Our article on visceral fat in men, the fat stored around the organs, covers why.

What counts as a weight-related health condition?

A weight-related health condition is one that excess weight causes or worsens. The UK product information gives six examples, and NICE notes the list is not exhaustive: [2] [5]

• Hypertension (high blood pressure)
• Dyslipidaemia (abnormal blood fats, including raised cholesterol)
• Obstructive sleep apnoea
• Cardiovascular disease
• Prediabetes (blood sugar above normal but below the diabetes threshold)
• Type 2 diabetes

NHS England uses five of these to set its GP-practice criteria: hypertension, dyslipidaemia, obstructive sleep apnoea, cardiovascular disease and type 2 diabetes. [6]

Several of these conditions can be present without symptoms. Read more on cardiovascular disease, obstructive sleep apnoea, metabolic syndrome (a cluster of weight-related risk factors) and the warning signs of high cholesterol.

Who is not suitable?

Treatment is not suitable in pregnancy or when trying to conceive, or with certain medical histories, and HeMed treats adults only. [3] The clinician screens for these, and the patient information leaflet carries the full list.

The published UK sources set out the main categories:

• Pregnancy, trying to conceive, or breastfeeding. The MHRA says these medicines should not be taken during pregnancy, just before trying to get pregnant, or while breastfeeding, because there is not enough safety data. [3] The required gap before trying to conceive differs by medicine, from at least 1 month to at least 2 months. [3]
• A history of pancreatitis. The NHS says treatment may not be suitable if you have, or have had, an inflamed pancreas. [12] [13]
• A previous allergic reaction to a medicine of the same type. [12] [13]
• Under 18. The pharmacy regulator names people under 18 among the vulnerable groups in the concerns it received about supply outside the licensed criteria. [9]
• Eating disorders and mental health. Prescribers must consider wellbeing, because eating disorders, body dysmorphia and mental health issues can play a part in a request for these medicines. [11]

Planned surgery matters too. The MHRA asks anyone taking one of these medicines to tell their healthcare team, including the anaesthetist, before a procedure under general anaesthesia or deep sedation. [3]

Other medicines can also affect the decision. The NHS lists examples including some blood-thinning medicines, levothyroxine for an underactive thyroid, insulin and other diabetes medicines. [12] [13] List any medication you take in the eligibility check and a clinician will review it before any plan begins.

What does a clinician check before deciding?

A clinician checks who you are, what you weigh, what conditions you have, what you take and what has been tried before. The pharmacy regulator sets these as requirements for registered pharmacies in Great Britain supplying medicines for weight management online. [8]

1. Identity. The prescriber must have a process to confirm that the medicine goes to the right person. [8]
2. Weight, height and BMI, independently verified. That means a different route from the figures you typed in: a video consultation, an in-person check, your clinical records, or contact with your GP. A phone call is not accepted for medicines for weight management. [8] A photograph alone is not accepted either. [10]
3. Medical history, verified for long-term conditions. People with certain conditions can be suitable at a lower BMI, so the regulator expects prescribers to verify that history before supplying treatment. [10]
4. Weight-related conditions. NICE says to identify comorbidities after the initial assessment and to start managing them straight away, not after weight loss. [7]
5. Previous attempts and what matters to you. NICE asks clinicians to discuss earlier attempts, barriers and preferences, and factors such as ethnicity, family history and eating disorders. [7]
6. Your GP. The prescriber should have your GP's details and your consent to share relevant information. If there is no consent, the prescriber must record a risk-based assessment before deciding whether it is safe to prescribe. [8]

Blood markers add what a questionnaire cannot see. NICE recommends identifying the health conditions linked to weight at the start and reviewing regularly during treatment. [7]

Raised cholesterol and raised blood sugar both map to conditions on the list above (dyslipidaemia, prediabetes and type 2 diabetes), and a blood test is how they are found. Liver function is not on that list, but NICE's appraisal counted fatty liver disease as a weight-related complication, and a clinician looks at it too. [5] Our guide to what a men's health blood test checks explains each marker.

Why does the pharmacy regulator say a questionnaire alone is not enough?

A questionnaire alone is not enough because it records what a person says, not what is true. Every service starts with questions. The difference is what happens next.

In February 2025 the General Pharmaceutical Council (GPhC), the pharmacy regulator in Great Britain, tightened its rules. Its guidance says the prescriber "does not base prescribing decisions on the information provided in a questionnaire alone" and verifies it another way. The accepted routes are two-way communication, clinical records, or contact with the GP. [8]

In April 2026 the pharmacy regulator reported cases where weight-loss treatment was approved on a self-declared online questionnaire alone, and told prescribers to verify rather than rely on it. [9] The GPhC review covered 1,307 concerns received in 2024 and 2025, 27% of them about prescribing practice. [9] Some of the concerns described photographs that could be edited. [9]

For you, the practical test is simple. Ask any provider how they verify your weight and your history, and what they measure before they prescribe. Our checklist for weight loss programmes lists the questions.

Can you be assessed at home?

Yes. The regulator accepts a video consultation, your clinical records or contact with your GP as ways to verify your details. [8]

A blood sample can also be taken at home. You do not make the decision yourself: a registered clinician does, in person or remotely.

At HeMed, the process runs in three steps:

1. Fill in a short set of online questions so a clinician can check whether treatment may be suitable for you.
2. Complete your included needle-free blood test to understand your current health.
3. A clinician reviews your blood test first.

Switching from another UK provider and on treatment within the last 2 months? The baseline blood test is your choice: a clinician can assess you from proof of your prescription and your medical history.

The blood test screens for four key areas linked to weight and metabolic health. Two of its markers are worth defining first. HbA1c is your average blood sugar over roughly the past three months, and triglycerides are the fats your body stores and burns for energy.

Cardiovascular risk (total cholesterol, LDL, HDL, triglycerides and the cholesterol ratio), liver function (ALT, AST and GGT), diabetes risk (HbA1c) and thyroid function (TSH). 10 markers in all. Results are typically ready within 48 hours of your sample reaching the lab.

Read more about the at-home blood test and what we test.

What happens if you are not eligible?

If you are not eligible, a good service tells you clearly, explains why, and points you to the right support. At HeMed, if your blood test shows the plan isn't suitable for you, we explain why and refund your first payment in full. The terms set out when a refund applies.

Not eligible does not mean no options. NICE's starting point for every adult living with overweight or obesity is dietary, exercise and behavioural support, with medicines considered after those have been started and evaluated. [7] Your GP can refer you to NHS weight management services, and the criteria for specialist referral include previous attempts that have not worked. [7]

If a blood result needs attention, that is a reason to speak to your GP, whatever the eligibility decision. Men aged 40 to 74 in England can also ask for a free NHS Health Check every 5 years. [14] It is for people without a diagnosed heart, kidney, diabetes or blood pressure condition, and includes height, weight, waist, blood pressure and cholesterol. [14]

NHS or private: which route?

Neither route is a shortcut: both require a clinician to assess your suitability. The NHS route is free and tied to your medical record. Its criteria are narrower, and access depends on your integrated care board (the NHS body that plans local services). [6]

A private clinician-led programme works within the licence, at a cost. If your health picture is complex, or you take several medicines that need one clinician coordinating them, the GP route is the right clinical choice. Our article on GP or online clinician-led weight management works through the decision.

How HeMed approaches eligibility

Always a clinical decision, made after your blood test and health review. Adults with a BMI of 30 or over, or 27 or over alongside a weight-related health condition, may be considered. Treatment is not suitable in pregnancy or when trying to conceive, under 18, or with certain medical histories. Switching from another UK provider and on treatment within the last 2 months? The baseline blood test is your choice, and you may continue treatment from a BMI of 23, subject to proof of prescription, medical history and clinical review.

HeMed's medical weight loss service starts with an at-home blood test. A clinician reviews your results before anything is prescribed, builds your plan around your markers, and you retest every 6 months to see what is changing.

The Care Quality Commission (CQC) is the regulator of health and social care services in England. Clinical, consultation and prescribing services are provided by eMed, a CQC-registered provider.

Frequently asked questions

Is eligibility different for men?

No. The UK licence and the NICE criteria set the same BMI and health-condition thresholds for adults of either sex. Several of the qualifying conditions, such as raised cholesterol and raised blood sugar, are found by a blood test, which is why testing before any decision matters.

Does my BMI alone decide?

No: BMI is the entry criterion, not the decision. A clinician also weighs your health conditions, your medical history and the medicines you take. At HeMed, your baseline blood test is part of that picture.

Can I be eligible with a BMI under 30?

Under the UK licence, adults with a BMI of 27 to under 30 may be considered if they have at least one weight-related health condition. Examples include high blood pressure, raised blood fats, sleep apnoea or prediabetes. [2] The clinician confirms the condition from your history or your results, not from what you declare on the form alone. If you are switching from another UK provider, you may continue treatment from a BMI of 23, subject to proof of prescription, medical history and clinical review.

Can I be eligible if I have type 2 diabetes?

Type 2 diabetes is one of the listed weight-related conditions, so it can support eligibility. It also means your diabetes medicines and your GP's care need to be taken into account, because some diabetes medicines interact. [12] [13] A clinician reviews that before any plan begins.

Does my GP need to know?

The pharmacy regulator expects online providers to ask for your GP's details and your consent to share relevant information about the prescription. If you refuse, the prescriber must record a risk-based assessment before deciding whether it is safe to prescribe. [8] It is a safety measure, not a barrier.

How long does the eligibility check take?

At HeMed, the eligibility check takes a few minutes. Every new plan starts with a blood test, so the decisions come from your numbers. Results are typically ready within 48 hours of your sample reaching the lab, and a clinician reviews your blood test first.

What if I am not eligible?

If your blood test shows the plan isn't suitable for you, we explain why and refund your first payment in full. The terms set out when a refund applies. Where a result needs GP-level attention, that is a reason to speak to your GP, who can arrange further tests.

HeMed provides clinician-led weight management. This page is general health information, not medical advice. Treatment is prescription-only and is prescribed only where a clinician decides it is suitable. If you are worried about symptoms, speak to your GP, or use NHS 111.

Next step: read how clinician-led weight management works.

Sources (15)

1. Electronic Medicines Compendium, Summary of Product Characteristics for the first licensed weight-management medicine, section 4.1 Therapeutic indications (text revised September 2026; last updated on emc 22 September 2026). medicines.org.uk. Accessed 8 October 2026. Cited for the licensed BMI criteria only; the medicine is not named on this page by policy.
2. Electronic Medicines Compendium, Summary of Product Characteristics for the second licensed weight-management medicine, section 4.1 Therapeutic indications (text revised 29 August 2026; last updated on emc 8 September 2026). medicines.org.uk. Accessed 8 October 2026. Cited for the licensed BMI criteria and the example comorbidities only.
3. Medicines and Healthcare products Regulatory Agency, patient information on the licensed medicines for weight loss and diabetes ("what you need to know"), updated 5 February 2026. gov.uk. Accessed 8 October 2026.
4. National Institute for Health and Care Excellence, Technology appraisal guidance TA875 (managing overweight and obesity), recommendation 1.1, published 8 March 2023, last updated 4 September 2023. nice.org.uk. Accessed 8 October 2026.
5. National Institute for Health and Care Excellence, Technology appraisal guidance TA1026 (managing overweight and obesity), recommendation 1.1, section 4.10 and the implementation section, published 23 December 2024, last updated 1 September 2025. nice.org.uk. Accessed 8 October 2026.
6. NHS England, medicines for obesity: the page on NHS access criteria for weight management medicines (no publication date shown on the page). england.nhs.uk. Accessed 8 October 2026. Primary-care criteria as stated on that date.
7. National Institute for Health and Care Excellence, NICE guideline NG246, "Overweight and obesity management", recommendations 1.9.7, 1.9.8, 1.9.11, 1.9.12, 1.9.15, 1.9.16, 1.9.17, 1.11.6, 1.11.7, 1.11.13, 1.17.1, 1.17.2 and 1.17.6, published 14 January 2025, last updated 8 January 2026. nice.org.uk. Accessed 8 October 2026.
8. General Pharmaceutical Council, "Guidance for registered pharmacies providing pharmacy services at a distance, including on the internet", February 2025, section 4.2 items j, k and l. pharmacyregulation.org. Accessed 8 October 2026.
9. General Pharmaceutical Council, "Weight management medicines and services: a review of GPhC inspections and concerns", April 2026 (data January 2024 to December 2025). pharmacyregulation.org. Accessed 8 October 2026.
10. General Pharmaceutical Council, "Providing weight management services: FAQs". pharmacyregulation.org. Accessed 8 October 2026.
11. General Pharmaceutical Council, "Weight loss medications: FAQ" for patients and the public. pharmacyregulation.org. Accessed 8 October 2026.
12. NHS medicines information, page for the first licensed weight-management medicine, last reviewed 15 May 2026. nhs.uk. Accessed 8 October 2026. Cited for the "who can and cannot use" and interaction categories only.
13. NHS medicines information, page for the second licensed weight-management medicine, last reviewed 15 May 2026. nhs.uk. Accessed 8 October 2026. Cited for the "who can and cannot use" and interaction categories only.
14. NHS, "NHS Health Check", page last reviewed 14 August 2023. nhs.uk. Accessed 8 October 2026.
15. NHS England Digital, Health Survey for England 2024, "Adults' overweight and obesity". digital.nhs.uk. Accessed 8 October 2026.

Numbered markers in the page text link to these entries. Statistics describe populations, not any one person’s results. Eligibility thresholds and NHS access rules are quoted from the cited documents as published on 8 October 2026, can change, and are not a HeMed assessment of any individual.