Can you use weight loss medications with a healthy BMI?

You need a BMI of 30 or above (or 27 and above if you have a weight-related health condition) to be eligible for a weight loss injection (WLI). If you have a BMI lower than this, it’s unlikely you’ll be prescribed treatment.

But there are a few exceptions where you might be eligible even if you don’t meet the standard requirements.

Medically reviewed by

Alexandra Cristina Cowell, Writer & Clinical Content Reviewer

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Reviewed on Oct 03, 2025. by Dr Alexandra Cristina Cowell Writer & Clinical Content Reviewer Registered with GPhC (No. 2241935) Next review due on Oct 03, 2028.

Last updated on Feb 27, 2026.

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Summary:

Weight loss injections are usually prescribed for people with a BMI of 30+ or 27+ with weight-related conditions.
Insurance or clinical guidelines can be stricter and may specify certain health conditions to be eligible.
WLIs are rarely prescribed for people with a BMI lower than 25, but there are exceptions for people continuing treatment after they’ve lost weight, or as an off-label use for certain other health conditions.
If you achieve a healthy BMI with WLIs, your doctor may recommend continuing treatment to help you maintain your current weight.

What BMI is eligible for weight loss injections?

A BMI of 30 or higher, or 27 with weight-related health conditions such as diabetes or cardiovascular disease, is generally required to be prescribed a weight loss injection under FDA guidelines.

In some clinical settings, the criteria for WLIs is higher, requiring a BMI of 35 or 40 for some treatments like Zepbound. For some treatments, such as Wegovy, you must also have a weight-related health condition.

Certain ethnic groups, including Asian, Chinese, Middle Eastern, Black African, and African-Caribbean individuals, may have a lower BMI threshold of 27.5 (for obesity) or 23 (for overweight) as they have a higher risk of conditions such as heart attack, stroke, and diabetes at lower weights.

What are the requirements to use weight loss injections at a healthy weight?

There’s a very good chance you won’t be prescribed WLIs at a healthy weight (a BMI of 18.5-24.9), but there may be a few exceptions.

You’re part way through weight loss injection treatment

If you started your treatment with a high BMI and now have a healthy BMI, your doctor will likely recommend continuing the treatment to help you maintain the lost weight.

This is because research has shown that stopping treatment can cause weight gain. One study found patients regained around 11.6% of their lost weight, and the health improvements reversed after gaining back the weight.

Only once you and your doctor are both confident that you can maintain the lost weight without injections will they gradually decrease your dose until you’ve completely stopped.

You have a health condition

Sometimes, a doctor may prescribe WLIs even if you don’t meet the BMI requirements. But this is considered off-label, meaning it’s against the standard recommended guidelines.

For example, consider a person of South Asian descent who has a BMI of 26 and high cholesterol. Despite trying diet and exercise, they haven’t seen any improvements. In this situation, a doctor might recommend weight loss medication as it could be beneficial for them.

Other conditions that may qualify you for WLIs include:

High blood pressure
Type 2 diabetes or prediabetes
Dyslipidemia (high cholesterol or triglycerides)
Obstructive sleep apnea
Nonalcoholic fatty liver disease (NAFLD)
Insulin resistance
Polycystic ovary syndrome (PCOS)
Mobility difficulties

Your doctor will evaluate your case in detail before coming to a decision.

You used them previously and are struggling to maintain your weight

A healthcare provider might let you start WLIs again if you’re struggling to maintain your weight loss.

For example, if you went from a BMI of 35 to 24 with treatment, but after a few months of stopping, you notice you’re gaining back the weight quickly. In this case, you may not have to wait until your BMI increases to start treatment again. Typically, you can restart treatment within three months of stopping.

By restarting earlier, it can help you prevent you gaining more weight and re-entering the overweight or obese BMI categories.

But you won’t be able to resume your previous dose if it’s been more than six weeks since you stopped treatment. You’ll restart on the starting dose to reduce the risk of side effects and allow your body to adjust to the treatment.

What if I’m at a healthy weight but beginning to gain weight again?

It really depends on how long it’s been since you’ve stopped.

If it’s been less than three months, you can log in to your account and click ‘Reorder’. This will allow you to order your treatment again, without needing another full consultation. Even if you have a healthy BMI, this treatment wouldn’t be considered ‘off-label’, as we would treat it as ongoing maintenance.

If it’s been more than three months, you might have to start the process again. But if you reached a healthy BMI, your doctor might decline your request to restart.

Whatever your situation, it’s a good idea to check in with your healthcare provider to see what they recommend.

What verification does Treated need to approve WLIs at a healthy weight?

Our doctors will ask you for a couple of things to make sure the treatment is suitable for you.

Photos

You’ll be asked to send a few photos to verify your weight and height. Make sure to take a clear, full-body picture in clothes that let us see your body clearly. You’ll be given clear instructions on how to take your pictures on the screen where you upload them.

Your height and weight

We’ll ask a few medical and personal questions, such as your:

Weight (current, and what your weight was when you started treatment)
Height
Pregnancy status
If you have health conditions

Your treatment history

If you're switching from another provider or treatment, we’ll ask for some information about your weight loss journey so far, including what treatments you’ve tried, what your most recent dose was, and when you last used treatment. This way, we can check whether the treatment is suitable and safe for you.

(Please note that if the doctor doesn’t think treatment is suitable for you or that you won’t benefit from using it, they won’t be able to recommend it for you, and instead will refer you to your primary care physician for further support.)

Sourcing guidelines:

When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.

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Disclaimer: The information provided on this page is not a substitute for professional medical advice, diagnosis, or treatment. If you have any questions or concerns about your health, please talk to a doctor.