Cheapest Weight Loss Injections in the UK: What Should You Compare?

If you are looking for the cheapest weight loss injections in the UK, the headline price is usually the first thing you notice.

But it is not always the most useful number.

The price of prescription weight loss injections can vary depending on:

• Which medicine you are prescribed
• Your dose
• How long you have been on treatment
• Whether clinical assessment is included
• Delivery charges
• Whether a provider charges additional consultation or prescription fees

At Keltoi Wellness, injectable weight management treatment currently starts from £59.99 for one month's supply, subject to clinical assessment.

So which weight loss injection is cheapest, and what should you check before choosing a provider?

What Is the Cheapest Weight Loss Injection at Keltoi?

At the time of writing, Wegovy is the lowest-priced injectable weight management option listed by Keltoi, starting from:

Wegovy

From £59.99 for one month's supply

Wegovy contains semaglutide and is normally used as a once-weekly injection.

Mounjaro

From £99 for one month's supply

Mounjaro contains tirzepatide and is also normally administered once weekly.

Prices can vary depending on the dose prescribed, so you should always check the current price before starting or renewing treatment.

Treatment is subject to clinical assessment and the prescribing clinician decides which treatment and dose, if any, are appropriate.

[View Keltoi weight management prices](/pricing)

Is Wegovy Cheaper Than Mounjaro?

At Keltoi's current starting prices, Wegovy costs less than Mounjaro.

However, comparing only the introductory or starting price does not necessarily tell you what treatment will cost over several months.

Weight loss injections usually involve gradual dose increases.

For example, Wegovy is normally started at a lower weekly dose and increased gradually over time.

Mounjaro also follows a staged dosing schedule, beginning at a lower dose before increases are considered.

As the dose changes, the price may also change.

That means it is worth asking:

• What does the first month cost?
• What will month two cost?
• How much are the higher doses?
• Is delivery included?
• Are there consultation fees?
• Are there additional prescription charges?

A provider with the lowest first-month offer will not necessarily remain the cheapest later.

Why Do Weight Loss Injection Prices Vary So Much?

Private weight management providers set their own prices.

The total amount you pay can include more than the medication itself.

Depending on the provider, it may cover:

• Clinical assessment
• Prescription review
• Medication
• Pharmacy dispensing
• Delivery
• Follow-up support
• Administration costs

Some providers separate these charges.

Others bundle them together.

This is one reason two websites can advertise the same medicine at noticeably different prices.

Does a Cheap First Month Mean Cheap Treatment?

Not always.

Introductory discounts are common in private weight management.

You might see:

“First month from £49”

or:

“£50 off your first order.”

Those deals can be genuine, but you should check what happens afterwards.

If you are likely to remain on treatment for several months, the ongoing monthly price is usually more important than the introductory offer.

For example, imagine two providers:

| Provider | Month 1 | Month 2 onwards | |---|---:|---:| | Provider A | £49 | £199 | | Provider B | £99 | £129 |

Provider A appears cheaper initially.

Over several months, however, Provider B could cost less overall.

This is why comparing weight loss injection prices should involve more than simply looking for the biggest discount.

Are Higher Doses More Expensive?

They can be.

Weight management injections are available in different strengths.

As treatment progresses, a clinician may consider increasing your dose depending on your individual circumstances and the approved dosing schedule.

Different strengths can have different prices.

For this reason, you should avoid assuming that the cost you pay during your first month will remain the same indefinitely.

At Keltoi, the available treatment and dose are determined following clinical review.

You can express a preference, but you cannot simply choose a higher or lower dose based on price.

How Much Does Wegovy Cost Privately?

Private Wegovy prices vary considerably between providers.

At Keltoi, Wegovy currently starts from £59.99 for one month's supply.

Wegovy contains semaglutide and is licensed for weight management in appropriate adults.

Adults generally need an initial BMI of:

• 30 or above, or
• 27 to 29.9 with at least one weight-related health condition

Meeting the BMI criteria does not automatically mean Wegovy will be prescribed.

A clinician still needs to assess whether treatment is suitable.

How Much Does Mounjaro Cost Privately?

Mounjaro is another commonly prescribed private weight management treatment.

At Keltoi, Mounjaro currently starts from £99 for one month's supply.

Mounjaro contains tirzepatide.

Like Wegovy, its licensed weight-management indication generally includes adults with:

• A BMI of 30 or above, or
• A BMI of 27 to 29.9 alongside at least one weight-related health condition

The appropriate medicine and dose need to be decided by a clinician following assessment.

Which Is Better Value: Wegovy or Mounjaro?

There is no single answer.

The cheapest medicine is not automatically the most appropriate treatment for you.

Your clinician may consider factors such as:

• Your BMI
• Medical history
• Current medicines
• Previous weight management treatment
• Previous side effects
• Other health conditions
• Your treatment history

Cost can reasonably be part of your decision, but clinical suitability should come first.

A treatment is poor value if it is not appropriate for you, regardless of how low the advertised price is.

Are Cheap Weight Loss Injections Safe?

A low price does not automatically mean a provider is unsafe.

But extremely cheap offers from unregulated sellers should be treated with caution.

GLP-1 weight management medicines are prescription-only medicines in the UK.

You should only obtain them following an appropriate consultation with a healthcare professional and through a legitimate pharmacy.

The MHRA warns against purchasing weight loss injections from sources such as:

• Social media sellers
• Beauty salons
• Unregulated websites
• Sellers who do not require a medical assessment
• People offering unlicensed injectable powders

Counterfeit weight loss medicines have been found in the UK.

If somebody will sell you a prescription-only injection without asking meaningful questions about your health, that should be a major warning sign.

What Should Be Included in the Price?

Before choosing a private weight management provider, check what your payment actually includes.

Look for clear information about:

The medication

Is the price for a full month's supply?

Clinical assessment

Is a clinician actually reviewing your information before a prescription is issued?

Delivery

Is delivery included or charged separately?

Ongoing support

Can you contact the service if you need help with your order or treatment?

Higher-dose pricing

Does the price increase significantly when your dose changes?

Refunds

What happens if the clinician decides that treatment cannot be supplied?

Clear pricing makes it much easier to compare providers properly.

What Happens if I Am Not Suitable for Weight Loss Injections?

Paying for an assessment should never guarantee a prescription.

Prescription weight management treatment can only be supplied where the prescribing clinician considers it appropriate.

With Keltoi, if a clinical review determines that no suitable medication-service treatment can be supplied, the medication-service purchase is refunded in line with Keltoi's refund policy.

The clinical decision always comes before the sale of medication.

Can I Get Cheap Weight Loss Injections Without a Prescription?

You should not.

Wegovy, Mounjaro and other GLP-1 weight management medicines are prescription-only medicines.

A legitimate UK provider should require a clinical assessment before they are supplied.

The MHRA advises people not to buy GLP-1 medicines from unregulated sources or sellers offering them without a proper consultation.

Buying an injection privately does not remove the requirement for medical assessment.

Are Weight Loss Injections Cheaper on the NHS?

Where NHS or Health and Social Care treatment is available and you qualify, the cost to the patient can obviously be considerably lower than paying privately.

However, access for weight management is restricted and the NHS eligibility criteria are not the same as private prescribing criteria.

This is particularly relevant in Northern Ireland, where access through the new Regional Obesity Management Service is initially focused on people with the highest clinical need.

You can read our full guide here:

[Can I Get Weight Loss Injections on the NHS in Northern Ireland?](/blog/can-i-get-weight-loss-injections-on-the-nhs-northern-ireland)

Am I Eligible for Weight Loss Injections?

For private treatment, your BMI is usually one of the starting points.

As a general guide:

• BMI 30 or above: you may meet the weight criteria
• BMI 27 to 29.9: you may qualify if you also have a relevant weight-related condition
• BMI below 27: you would not normally meet the licensed criteria for these medicines for weight management

Your medical history also needs to be assessed.

For a more detailed explanation, see:

[Weight Loss Injections Eligibility: Who Can Get Them in the UK?](/blog/weight-loss-injections-eligibility)

How Can I Keep the Cost of Private Weight Loss Treatment Down?

There are a few sensible ways to compare costs.

Compare the full monthly price

Do not focus only on introductory discounts.

Check the cost of later doses

The cheapest starter dose may not remain the cheapest treatment.

Look for hidden charges

Check consultation, prescription and delivery fees.

Do not buy more medication than prescribed

Your dose should be determined clinically rather than by what appears cheapest.

Compare like with like

A £99 treatment that includes clinical review and delivery may represent better value than an £89 headline price with additional charges.

Cheap Does Not Have to Mean Poor Service

Affordable treatment and proper medical oversight are not mutually exclusive.

The important distinction is between competitively priced legitimate healthcare and medicine being sold cheaply without appropriate safeguards.

A genuine private weight management service should still provide:

• Appropriate clinical assessment
• A legitimate prescription where suitable
• Medication from a registered pharmacy
• Clear pricing
• Secure delivery
• A route to contact the service if needed

Price matters, particularly when treatment may continue for several months.

It just should not be the only consideration.

Cheapest Weight Loss Injections at Keltoi

If price is one of the reasons you are comparing private weight management providers, Keltoi aims to keep treatment straightforward and competitively priced.

Current injectable treatment starts from:

• Wegovy from £59.99
• Mounjaro from £99

Prices shown are for one month's supply at the starting prices currently displayed by Keltoi and may change. The cost can also vary according to the dose prescribed.

Keltoi provides private weight management services to adults across Northern Ireland and the rest of the UK.

You can start with our online eligibility assessment before deciding whether you want to proceed.

• No GP referral required to start
• UK clinician review
• Prescription treatment only where clinically appropriate
• Discreet home delivery
• No obligation to continue month to month

[Check your eligibility with Keltoi](/book-consultation)

Treatment is subject to clinical assessment. Meeting the eligibility criteria does not guarantee that medication will be prescribed. Prices may vary by dose and may change.

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This article provides general information and does not replace personalised medical advice, diagnosis or treatment. Prescription medicines should only be used following assessment by an appropriately qualified healthcare professional.