Eligibility
Weight loss treatment eligibility, explained.
There’s no simple checklist. Whether a treatment is appropriate is a clinical decision, made by a qualified healthcare professional who looks at your health as a whole.
Eligibility is a clinical decision
A weight management assessment gathers information about you. It doesn’t decide eligibility on its own. Where regulated treatment is involved, an appropriately qualified healthcare professional reviews that information and decides whether treatment is appropriate — and they may decide it isn’t.
What clinicians usually consider
Body mass index (BMI)
BMI is one starting point. UK guidance and medicine licences refer to BMI thresholds, and lower thresholds are used for people from some ethnic backgrounds who have a higher risk of health conditions at a lower BMI. Meeting a threshold doesn’t mean a treatment is suitable. You can check your BMI with our BMI calculator.
Weight-related health conditions
Conditions such as type 2 diabetes, high blood pressure, sleep apnoea or heart disease can affect the options a clinician considers.
Your medical history and medicines
Past and current conditions, other medicines you take and any allergies all matter. Some conditions mean a treatment would not be safe.
Pregnancy and contraception
Many weight loss medicines must not be used during pregnancy or breastfeeding, or when trying to conceive.
What you’ve already tried
Clinicians usually expect treatment to sit alongside changes to food and activity, not replace them.
Why you may be asked for more information
A clinician may ask for verification — such as identity checks, a recent weight check or information from your GP — before making a decision. This is part of safe prescribing.
If treatment isn’t appropriate
A clinician may decide that treatment isn’t appropriate for you at the moment. That’s a safety decision, not a judgement. They may suggest other support, or that you speak to your GP.
Frequently asked questions
If my BMI is over 30, will I be eligible?
Not automatically. BMI is one factor. A healthcare professional considers your health, medicines and history before deciding whether any treatment is appropriate.
Why are BMI thresholds lower for some people?
People from South Asian, Chinese, other Asian, Middle Eastern, Black African or African-Caribbean family backgrounds have a higher risk of some conditions at a lower BMI, so UK guidance uses lower thresholds.
Can I be assessed if I’m under 18?
No. This information is for adults aged 18 and over.
Sources and further reading
This page is for general education only. It isn’t medical advice, it doesn’t recommend any treatment, and it doesn’t replace a conversation with a qualified healthcare professional about your own circumstances. If you need urgent medical help, call 999 or NHS 111.