GLP-1 medications explained: What they are and what they’re not

GLP-1 medications have become a major topic in health and wellbeing conversations, from diabetes care to clinically supported weight management. But alongside the headlines, there’s still confusion about what GLP-1 medications actually do, what they don’t do, and how they fit into a long-term approach to health.

In this guide, we break down what GLP-1 medications are and how they work, including the important role that exercise and movement play alongside GLP-1 treatment.

What Does “GLP-1” Mean?

GLP-1 stands for glucagon-like peptide-1. This is a naturally-occurring hormone that your body releases after eating, which plays a key role in regulating appetite and blood sugar by:

• Stimulating the pancreas to release insulin when blood sugar rises

• Suppressing the hormone glucagon, which raises blood sugar (preventing the release of more glucose into your bloodstream)

• Slowing digestion, so it takes your body longer to absorb the sugar in the food you’ve eaten (making you feel fuller for longer)

• Sending signals to the brain that reduce hunger

GLP-1 medications (also called GLP-1 receptor agonists) are designed to mimic the body’s GLP-1 hormone. They can either be taken as injections or tablets.

Different Types of GLP-1 Medications in the UK

There are three main types of GLP-1 medications approved for use in the UK:

• Semaglutide

  • Ozempic

  • Rybelsus

  • Wegovy

• Liraglutide

  • Saxenda

  • Nevolat

• Tirzepatide

  • Mounjaro

Additional medications available in the UK include orlistat (a prescription-only pill licensed for weight management) and dulaglutide and exenatide (injections licensed for Type 2 diabetes).

What GLP-1 Medications Are Not

1. They Are Not a “Quick Fix”

GLP-1 medications alone cannot and should not be used to treat Type 2 diabetes or obesity.

They’re not a shortcut or a standalone solution, and should always be used alongside other suitable treatments like lifestyle and dietary changes, including consistent physical activity, under the supervision of a healthcare professional.

Stopping medication without sustainable habits in place can lead to weight regain, which is why exercise plays such an important role in long-term weight management strategies.

2. They Are Not Suitable for Everyone

Like all medications, GLP-1s can cause side effects. The most common are digestive symptoms such as nausea, particularly at the start of treatment, though there are other potential adverse reactions your doctor should make you aware of before you begin these medications.

They are also not appropriate for everyone, and a healthcare professional must assess your suitability and monitor your medication use throughout the treatment period.

The NHS follows rules set by the National Institute of Care and Excellence (NICE), and has strict criteria for who can be prescribed GLP-1 medications on the NHS. This includes guidelines on age, body mass index (BMI), medication history, and other medical conditions. You should also not take this medication if you are pregnant.

Why Exercise Matters When Using GLP-1s

If you’re prescribed a GLP-1 medication, exercise becomes a key part of protecting your health, preserving muscle mass, and sustaining weight loss.

Regular movement while using GLP-1 medications can help to:

GLP-1 Medication and Long-Term Health

GLP-1 medications are best understood as medical tools, not lifestyle replacements. They can support appetite regulation, but long-term wellbeing still depends on:

• Physical activity

• Strength and mobility

• Habit-building

• Confidence in movement

Health is about far more than the number on a scale.