Reviewed by Julie Boora, Superintendent Pharmacist & Clinical Director, TribElle Health Ltd (GPhC Reg. 9012688)
Appetite & hormones · GLP-1 guide
Appetite suppression naturally varies over time and is influenced by your hormones, sleep, stress, food choices, menstrual cycle, activity levels and how long you've been taking treatment.
If you're taking Mounjaro® (tirzepatide) or Wegovy® (semaglutide) and your appetite has returned, don't panic. The medication is still working — even if you feel hungry sometimes.
Learning how GLP-1 medicines work alongside your body's natural hormones is one of the keys to long-term weight loss.
What you'll learn
GLP-1 receptor agonists mimic a naturally occurring hormone called glucagon-like peptide-1 (GLP-1), which is released by your gut after eating. These medicines help by:
Some medicines, such as Mounjaro (tirzepatide), also activate GIP (glucose-dependent insulinotropic polypeptide) receptors, providing additional metabolic benefits.
One of the biggest misconceptions is that GLP-1 medications should completely remove hunger. In reality, hunger is a normal biological signal.
The goal isn't to eliminate appetite — it's to make it easier to eat appropriate portions and reduce constant food thoughts. Several factors influence how hungry you feel.
During the first few weeks, many people notice dramatic appetite suppression. Over time your body adjusts. This doesn't necessarily mean the medication has stopped working — instead, your appetite often becomes more balanced, allowing you to enjoy food without constant cravings.
Women's hormones have a significant influence on appetite. Even while taking GLP-1 medication, these hormones continue to influence appetite.
Many women notice increased hunger during
Hunger hormones affected
Studies consistently show that inadequate sleep increases levels of ghrelin, the hormone that stimulates appetite, while reducing leptin, the hormone responsible for fullness. Even one poor night's sleep can make hunger feel stronger.
High cortisol levels don't necessarily make the medication less effective. However, chronic stress may increase cravings for high-energy foods and make healthy eating feel more difficult. Stress management remains an important part of successful long-term weight management.
Ironically, eating too little can sometimes increase hunger. Many people dramatically reduce their calorie intake during the first few months of treatment. Over time this can lead to:
A balanced diet with adequate protein and fibre helps support sustainable weight loss.
Feeling hungry occasionally is normal. Rather than trying to avoid hunger completely, focus on managing it effectively.
Hormonal changes can make losing weight feel much harder, particularly for women.
As oestrogen levels decline:
Many women notice weight accumulating around the abdomen despite eating similarly to before. GLP-1 medications can help reduce appetite and improve metabolic health, making it easier to maintain a calorie deficit alongside healthy lifestyle changes.
Women with Polycystic Ovary Syndrome (PCOS) or the emerging term Polyendocrine Metabolic Ovarian Syndrome (PMOS) often experience insulin resistance, increased hunger, difficulty losing weight and increased visceral fat.
GLP-1 medications have shown benefits for weight loss and improving insulin sensitivity in women with PCOS, although treatment should always be individualised.
Insulin resistance makes it harder for your body to regulate blood sugar efficiently. Many people experience increased hunger, fatigue, sugar cravings and difficulty losing weight.
GLP-1 medications improve insulin secretion in response to meals and can help improve blood glucose regulation.
Yes. Some people notice their appetite gradually increases towards the end of the week before their next scheduled injection. This appears to vary between individuals.
It's important not to inject earlier or change your dosing schedule unless advised by your prescribing clinician.
Contact your healthcare provider if
Never increase or reduce your dose without professional advice.
Not necessarily. Appetite suppression naturally fluctuates. Weight loss often continues even if hunger occasionally returns.
Some people notice appetite gradually increases towards the end of the dosing interval. Continue taking your medication exactly as prescribed.
Yes. Oestrogen, progesterone, insulin and cortisol all influence appetite, metabolism and fat storage. Hormonal life stages such as perimenopause and menopause can affect weight management.
Current evidence suggests GLP-1 medications remain effective during menopause. However, hormonal changes may influence appetite and body composition, making a holistic approach — including nutrition, exercise and sleep — even more important.
Many people find it helpful to prioritise protein, eat more fibre, stay hydrated, get enough sleep and include regular strength training as part of their routine.
Not necessarily. Feeling hungry sometimes is normal. Dose changes should only be made after discussion with your prescribing clinician.
Weight loss often slows over time as your body adapts. Reviewing your diet, activity levels, sleep and stress can be helpful before assuming your medication has stopped working.
GLP-1 medications may help reduce appetite and improve metabolic health in women experiencing hormone-related weight gain, including during perimenopause, menopause and in women with PCOS. Treatment should always be tailored to the individual.
GLP-1 medications are powerful tools for weight management, but they aren't designed to eliminate hunger completely. Appetite naturally fluctuates due to biological, hormonal and lifestyle factors, and occasional hunger doesn't mean your treatment has stopped working.
For many women, especially those navigating perimenopause, menopause or insulin resistance, combining GLP-1 therapy with adequate protein, fibre, strength training, good sleep and stress management offers the best chance of achieving sustainable, long-term weight loss.
At TribElle, we believe weight management is about more than prescribing medication. It's about understanding the whole person — their hormones, lifestyle, health goals and the support they need to succeed.
Supporting your body during weight loss treatment can make all the difference. From vitamins to collagen support, we've got you covered.
NICE. Tirzepatide for managing overweight and obesity (TA1026): nice.org.uk/guidance/ta1026
NICE. Semaglutide for managing overweight and obesity (TA875): nice.org.uk/guidance/ta875
MHRA. Mounjaro (tirzepatide) Summary of Product Characteristics: medicines.org.uk/emc
MHRA. Wegovy (semaglutide) Summary of Product Characteristics: medicines.org.uk/emc
Wilding JPH, et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity. NEJM. 2021: nejm.org/doi/full/10.1056/NEJMoa2032183
Jastreboff AM, et al. Tirzepatide Once Weekly for the Treatment of Obesity. NEJM. 2022: nejm.org/doi/full/10.1056/NEJMoa2206038
The Obesity Society: obesity.org
British Menopause Society. Weight gain and menopause: thebms.org.uk
© TribElle Health Ltd · GPhC Registration 9012688 · tribelle.co.uk · This content is for informational purposes only. Always consult a qualified healthcare professional.
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