How do you know if your BMI is high enough for medical treatment?

Whether you are eligible for medical treatment for overweight depends in the first place on your BMI. Doctors use a threshold of BMI 30 or higher as a starting point for medical treatment, but if health problems such as diabetes or high blood pressure are present, a threshold of BMI 27 already applies. Besides the BMI value, other factors also play a role, such as your health history and lifestyle. This article answers the most frequently asked questions about BMI, treatment thresholds and when medical supervision for weight loss is an option.

What BMI threshold do doctors use for medical treatment?

Doctors generally use a BMI of 30 or higher as the lower threshold for medical treatment of overweight. For people with weight-related conditions such as type 2 diabetes, high blood pressure or sleep apnoea, a lower threshold of BMI 27 applies. Below those values, medication is in most cases not considered medically justified.

These limits are not arbitrary. They are based on guidelines from international and national health organisations, with the risk-benefit ratio at the core. With a BMI below 27, the potential side effects of medication generally outweigh the health benefits. The higher the BMI and the more comorbid health risks, the greater the potential gain of a medical approach.

It is important to understand that a doctor always makes an individual assessment. The BMI threshold is a guideline, not an automatic gateway. A doctor weighs multiple factors before considering a treatment appropriate.

What counts alongside your BMI during a medical assessment?

In addition to your BMI, during a medical assessment a doctor also looks at your health history, existing conditions, medication use and lifestyle. Factors such as high blood pressure, elevated cholesterol, diabetes or a family history of cardiovascular disease can lower the threshold for treatment, even if your BMI is just above 27.

Specifically, the following elements can be taken into account:

• Comorbidities: conditions associated with being overweight, such as type 2 diabetes, sleep apnoea or joint problems
• Blood test results: raised blood sugar, cholesterol or blood pressure
• Previous attempts at weight loss: what has someone already tried and what was the result
• Medication use: some medicines are not compatible with certain treatments
• Lifestyle and motivation: whether someone is willing to make lifestyle changes alongside the treatment

A medical assessment is therefore always broader than a single number. Two people with the exact same BMI can have a very different outcome, depending on their overall health profile.

How do you calculate your BMI and what do the categories mean?

BMI stands for Body Mass Index and is calculated by dividing your weight in kilograms by your height in metres squared. A person weighing 85 kg and measuring 1.75 m has a BMI of 85 divided by 3.0625, which comes out at approximately 27.8. The calculation is simple and gives an initial indication of weight-related health risks.

The standard BMI categories are:

• Under 18.5: underweight
• 18.5 to 25: healthy weight
• 25 to 30: overweight
• 30 to 35: obesity class I
• 35 to 40: obesity class II
• 40 or higher: morbid obesity

BMI has limitations. It does not take muscle mass, fat distribution or age into account. Someone with a lot of muscle mass can have a high BMI without an increased health risk, whereas someone with a normal BMI can still have an unhealthy amount of belly fat. Doctors therefore use BMI as a starting point, not as the sole measurement. For people who want to know if they are eligible for a medical treatment for obesity, is BMI a useful first step in the orientation.

When are you eligible for GLP-1 medication such as semaglutide?

GLP-1 medication is generally considered in the Netherlands with a BMI of 30 or higher, or with a BMI of 27 or higher in combination with weight-related conditions. A doctor always assesses individually whether GLP-1 medication is medically justified and appropriate, based on the patient's complete health profile.

GLP-1 receptor agonists work by reducing feelings of hunger and supporting blood sugar regulation. They are used as an adjunct to lifestyle changes, not as a replacement for them. Results vary per person and depend partly on diet, exercise and adherence to treatment.

Who is not eligible?

Not everyone with a high BMI is a suitable candidate for GLP-1 medication. Contraindications may include certain thyroid disorders, a history of pancreatitis, pregnancy or the use of specific other medications. A doctor will weigh these factors during the assessment.

What does a doctor expect from the patient?

Doctors generally expect someone to be willing to work on lifestyle changes alongside medication. GLP-1 medication supports the process, but behavioural change remains an essential part of a successful journey. Anyone who approaches this realistically has a better chance of sustainable results.

What if your BMI falls just below the treatment threshold?

If your BMI is just below the threshold of 30, but you do have weight-related symptoms or conditions, a medical assessment is still useful. With a BMI between 27 and 30 with additional health risks, a doctor may judge that treatment is justified. Without those risk factors, medication will in most cases not be prescribed.

In that situation there are other steps that do make sense:

• Consult a doctor or dietitian regarding lifestyle interventions
• Gaining insight into your blood values and any risk factors
• To start a medical intake to have your situation assessed professionally

An initial consultation is not a guarantee of treatment, but it does provide clarity. Based on your full health profile, a doctor can assess whether there are options, even if your BMI does not quite meet the standard threshold. It is always better to have that assessment done than to conclude yourself that you are not eligible.

How Wellumo helps with a medical weight loss assessment

Wellumo offers people in the Netherlands the opportunity to start an online medical intake for weight-related treatments. The process is discreet, transparent about pricing and fully guided by BIG-registered doctors. Here is how it works:

• You fill in a medical questionnaire so that a doctor can fully assess your situation
• A GMC-registered physician independently assesses whether a treatment is medically justifiable
• Upon approval, a prescription will be drawn up and sent to the cooperating pharmacy.
• Medication is dispatched discreetly, with the option for a repeat subscription
• Not everyone is eligible: the doctor decides on the basis of your individual profile

Do you want to know if your BMI and health situation qualify for medical guidance? Read more about How Wellumo works or start immediately a Medical intake. Have you got any questions beforehand? If so, please do Contact us met Wellumo.