How does GLP-1 work in the body?

How does GLP-1 affect your appetite and weight?

For most people, this is the most important question: what difference does it actually make? GLP-1 (and GLP-1 medication) affects your appetite and energy balance in several ways.

• Delayed gastric emptying. GLP-1 ensures that food stays in your stomach for longer before moving on to the small intestine. As a result, you feel fuller for longer after a meal and the feeling of hunger takes longer to subside.
• Signals to the brain. GLP-1 acts on an area in the brainstem and hypothalamus that plays a key role in appetite and satiety. The hormone effectively amplifies the signal that says “I’ve had enough”, thereby reducing the urge to continue eating.
• Effect on blood sugar. Because GLP-1 stimulates the release of insulin and inhibits the release of glucagon, your blood sugar levels remain more stable. Large fluctuations in blood sugar levels can lead to sudden bouts of hunger; more stable blood sugar levels can reduce this type of craving.
• Fewer thoughts about food. Many people who take GLP-1 medication report that they think about food less often and experience less “noise in their head” when it comes to food. This is also known as “food noise”. Research suggests that GLP-1 plays a role in this, although the extent to which this occurs varies greatly from person to person.

It is important to emphasise that the exact effects vary from person to person. Factors such as dosage, individual sensitivity, lifestyle and underlying health conditions all play a part. GLP-1 medication is neither a fat burner nor a miracle cure: it supports a process in which you, with guidance, build a healthier relationship with food.

As with any medicine, side effects may occur, particularly affecting the gastrointestinal system, such as nausea or changes in bowel habits. This is one of the reasons why medical assessment and supervision whilst taking the medicine are so important.

When are GLP-1 medicines used for weight loss?

GLP-1 medication is not prescribed to just anyone who wants to lose weight. It is intended for people whose health is affected by being overweight or obese, and for whom previous attempts to lose weight have not yielded sufficient results.

When carrying out the assessment, a doctor looks at, amongst other things:

• Your BMI and health profile.
• Previous attempts to lose weight.
• Underlying medical conditions or use of medication.
• Possible contraindications, such as a history of certain thyroid or pancreatic disorders.
• Whether lifestyle guidance is advisable alongside medication.

This means that not everyone is eligible, and this is by design. GLP-1 medication is one part of a wider treatment programme, not a stand-alone solution. At WeightConsult, a doctor assesses each application individually, based on a medical questionnaire and, where necessary, an online consultation. Only if the programme is safe and appropriate will a personalised treatment plan be drawn up – including guidance on diet and lifestyle.

Medical supervision remains important even whilst the treatment is being administered. Weight, health and any side effects are monitored, and the treatment plan is adjusted where necessary. This ensures that the treatment remains not only effective, but above all safe.

Frequently asked questions about GLP-1

Is GLP-1 the same as insulin? No. GLP-1 does stimulate the release of insulin, but it is a different hormone with a broader range of effects, including influencing satiety and gastric emptying.

Do GLP-1 medicines work equally well for everyone? No. The response to GLP-1 medication varies from person to person, depending on factors such as health, lifestyle and the body’s sensitivity. A doctor can assess what is realistic based on your individual circumstances.

Is GLP-1 medication the same as a diet pill? No. GLP-1 medication mimics a hormone produced naturally by the body and affects feelings of fullness and blood sugar regulation. It is a prescription-only medicine that is only prescribed following a medical assessment; it is not an over-the-counter diet product.

Can I apply for GLP-1 medication myself without a medical assessment? No. Responsible use always requires a medical assessment, during which a doctor assesses whether the medicine is suitable and safe for your situation.

Does GLP-1 medication completely stop the feeling of hunger? Not completely, and that isn’t the aim anyway. The medication reduces excessive cravings and helps you feel full, making it easier to make healthier choices – it is not a substitute for a healthy lifestyle.

Key insights

• GLP-1 is a hormone that your body produces naturally after eating and which plays a role in satiety and blood sugar regulation.
• GLP-1 medication mimics this hormone, meaning it remains active for longer than the body’s own hormone.
• The medication reduces feelings of hunger by, amongst other things, slowing down gastric emptying and amplifying the signals of satiety in the brain.
• Not everyone is eligible for GLP-1 medication; a doctor assesses this on the basis of a person’s health, BMI and medical history.
• Lasting results are achieved through a combination of medical support, lifestyle changes and – where appropriate – medication, not through medication alone as a stand-alone solution.