GLP-1 Sequence: Peptide Chain and Dose Order Explained

01 · The core answer

What is the GLP-1 sequence?

The GLP-1 sequence is the specific order of amino acids that forms the hormone, written either as three-letter names or single letters. GLP-1 stands for glucagon-like peptide-1. Your gut releases it after you eat, and it signals fullness and helps the body handle sugar.

The natural hormone is a short peptide that the body breaks down very quickly. That is why drug developers change parts of the chain, so a medicine can act for a full week rather than minutes.

02 · Is this relevant to you?

Do you need to know the sequence?

No. The amino acid chain matters to researchers and students, but it does not affect how you use a licensed medicine. What matters in practice is the dose sequence your prescriber sets and how you respond to it.

If you are considering treatment, the practical next step is a free consultation reviewed by a GPhC-registered prescriber. You can start from our Mounjaro pen page, where the current standard price of the 2.5mg starting pen is £169.99 and a new customer's first order is £40 less with code FIRST40. You can also read about our weight loss clinic.

Related guide: Glp 1 amino acid sequence.

03 · Peptide to medicine

How the natural peptide becomes a medicine

Medicines in this class copy what natural GLP-1 does, but are built to resist the enzyme that destroys the hormone. Tirzepatide goes further than a copy. Tirzepatide is the first treatment of its kind to activate two natural gut-hormone receptors at once: GIP and GLP-1.¹

Together these help regulate appetite, slow how quickly the stomach empties, and improve the way the body responds to insulin.¹ Semaglutide, in Wegovy, is a single-action GLP-1 medicine, which is the main mechanical difference between the two.

04 · The dose sequence

The dose sequence for Mounjaro and Wegovy

Both medicines start at a low dose and step up gradually so your body can adjust. Mounjaro comes in six strengths: 2.5mg, 5mg, 7.5mg, 10mg, 12.5mg and 15mg.¹ Your prescriber decides when to move up and where to stop. If you step up after 4 weeks on each dose, the first four pens (2.5mg to 10mg) cost £959.96 in total at standard prices. A new customer's first order is £40 less and every later order £25 less.

Wegovy's ladder runs 0.25mg, 0.5mg, 1mg, 1.7mg and 2.4mg once weekly, stepping up after 4 weeks on each of 0.25mg, 0.5mg, 1mg and 1.7mg, with the 2.4mg maintenance dose starting from week 17.¹⁸ You can compare on the Wegovy pen page.

05 · What the evidence shows

What the evidence shows

In the SURMOUNT-1 trial of 2,539 adults, people taking tirzepatide alongside diet and exercise lost on average 15% of their body weight on 5mg, 19.5% on 10mg and 20.9% on 15mg over 72 weeks, compared with 3.1% with lifestyle changes alone.²

These are trial averages. Individual results vary, and treatment works alongside a reduced-calorie diet and increased physical activity, not instead of them.²

06 · Natural alternatives

Supplements and 'natural GLP-1' claims

No supplement contains the GLP-1 sequence or acts like a prescribed GLP-1 medicine. Products sold as 'nature's Ozempic' or the 'poor man's Ozempic' are low-cost supplements with no clinical oversight, and their dosing is not standardised.

Be wary of any seller offering injectable products without a consultation or prescription, or promising dramatic weight-loss claims. Our guide on whether GLP-1 is a con covers the marketing noise, and the GLP-1 prebiotic page looks at fibre-based products.

07 · Sticking with treatment

Staying on the sequence

Following the dose sequence consistently is what lets treatment work. Our aftercare includes ongoing monthly reviews, dose-titration and follow-up assessments by the prescribing team, plus side-effect support. Repeat orders re-check suitability, and there is no auto-shipping. Read more on GLP-1 adherence, or track your journey with the free GLPTrackr app.

Mounjaro is a prescription-only medicine supplied after an online consultation reviewed by a GPhC-registered prescriber. It is used alongside a reduced-calorie diet and increased physical activity. Individual results vary. This page is information, not a substitute for medical advice.