GLP-1s and Mental Health: Body Image, Weight Loss and Psychological Wellbeing

GLP-1s and Mental Health: Body Image, Weight Loss and Psychological Wellbeing

GLP-1 medications have changed the conversation around weight loss.

Medications such as semaglutide have become increasingly visible in healthcare, popular culture and social media, bringing with them conversations about appetite, weight, health and what our bodies are supposed to look like.

But there is another part of the conversation that receives considerably less attention: what happens psychologically when your body changes?

For some people, weight loss may coincide with improved confidence, mobility or quality of life. For others, losing weight doesn’t necessarily resolve longstanding concerns about appearance, self-worth or their relationship with food.

In some cases, rapid physical change can create entirely new psychological challenges.

Do GLP-1s affect mental health?

There isn’t a simple answer.

GLP-1 receptor agonists influence processes involved in appetite, satiety and reward, and researchers are increasingly interested in their wider psychological and behavioural effects.

At the same time, a person’s mental health while taking a GLP-1 isn’t determined by the medication alone.

Our relationship with weight is influenced by many things: previous experiences, self-esteem, social comparison, cultural expectations, weight stigma, eating behaviours and the meaning we attach to our appearance.

This means two people experiencing similar physical changes can feel very differently about them.

When your body changes faster than your body image

Body image isn’t simply what your body looks like.

It’s the thoughts, feelings, beliefs and perceptions you have about your body.

And those don’t necessarily change at the same speed as your physical appearance.

Someone can lose a significant amount of weight and still experience the same critical thoughts they had beforehand. They may continue to mentally picture themselves at their previous size, focus heavily on perceived flaws or find that the goalposts for feeling “good enough” simply move.

Instead of:

“I’ll feel comfortable with my body when I lose weight.”

it can become:

“Maybe I’ll feel comfortable if I lose a little more.”

This is one reason weight loss and improved body image shouldn’t automatically be treated as the same thing.

Why weight loss doesn’t always improve body confidence

It’s understandable to expect that changing something you’ve felt self-conscious about will make you feel better. Sometimes it does. But if someone’s self-esteem has become heavily tied to weight or appearance, physical change may not address the beliefs sitting underneath it.

Thoughts such as:

• “People will value me more if I’m thinner.”
• “I need to look a certain way to feel attractive.”
• “My weight says something about my self-control.”
• “I’ll finally be confident when I reach a particular size.”

can remain even after significant weight loss.

The number on the scale may change while the underlying rules about worth, attractiveness and acceptance remain exactly the same.

GLP-1s, food and the psychology of eating

Another significant change people sometimes describe when taking GLP-1 medications is a reduction in appetite or preoccupation with food.

For some people, this may feel freeing. For others, it can make an already complicated relationship with eating harder to recognise. Food is rarely purely physiological. Eating can also be connected with enjoyment, comfort, celebration, routine, culture, social connection and emotional regulation. Changes to hunger and appetite can therefore affect more than food intake alone.

This is particularly important for people who have experienced disordered eating, restrictive eating, binge eating or intense anxiety around their weight. GLP-1 medications are increasingly being studied in relation to eating behaviour, but the relationship is complex. They may have different effects for different people, and researchers have cautioned that more evidence is needed around their use in people with current or previous eating disorders.

The new pressure to lose weight

There is also a broader psychological issue emerging around GLP-1s. As substantial weight loss becomes increasingly visible and seemingly more achievable, some people may experience increased pressure to change their body. Social media before-and-after photos, celebrity weight-loss stories and conversations about who is or isn’t taking a GLP-1 can reinforce the idea that weight loss should always be pursued.

For someone already struggling with body image, this can intensify comparison.

Questions can shift from:

“Do I want to change my body?”

to:

“If everyone else can lose weight now, why haven’t I?”

That distinction matters. Health decisions are personal. They don’t need to be justified by other people’s bodies, expectations or opinions.

Weight stigma doesn’t necessarily disappear with weight loss

Another complicated experience can occur when someone’s treatment by other people changes after losing weight. Receiving more compliments, attention or positive feedback at a lower weight can initially feel validating. But it can also be painful. It may lead someone to wonder why they weren’t treated the same way before, or reinforce a belief that being thinner has made them more worthy of attention or acceptance. In this way, weight loss can sometimes expose rather than resolve experiences of weight stigma. Understanding these reactions can be an important part of adjusting psychologically to significant body change.

What happens if the weight returns?

Body image can also become particularly vulnerable when a person’s sense of confidence becomes dependent on maintaining a particular weight. Bodies naturally change throughout life, and medication plans can change too. If self-esteem has become strongly connected to the results achieved while taking a GLP-1, the possibility of weight regain may create anxiety, shame or a renewed sense of failure. Developing a more stable sense of self-worth can therefore be valuable regardless of whether someone’s weight goes up, down or remains the same.

How psychology can help

Seeing a psychologist doesn’t mean there is anything inherently wrong with wanting to lose weight or with using medication prescribed by an appropriate medical professional. Psychological support can instead help you understand the role weight and appearance have come to play in how you see yourself.

Therapy may explore areas including:

• body image and body dissatisfaction
• self-esteem and self-worth
• perfectionism
• social comparison
• weight stigma
• emotional eating
• binge eating or restrictive eating patterns
• anxiety around weight regain
• adjusting to significant physical change
• developing a healthier and more flexible relationship with food and your body.

The goal doesn’t have to be to love every part of your body.

Sometimes a more realistic starting point is learning to experience your body without it determining how you feel about yourself.

GLP-1s can change your body. Your relationship with your body may need attention too.

The conversation around GLP-1 medications is often centred on kilograms lost, appetite reduced or physical health outcomes. But significant weight change can also raise important questions about identity, confidence, eating, relationships and self-worth. If thoughts about your weight, food or appearance are taking up a significant amount of mental space, or you’re finding it difficult to adjust to changes in your body, speaking with a psychologist can help.

At The Three Seas Psychology, our psychologists work with a wide range of concerns related to body image, self-esteem, eating behaviours, anxiety and psychological wellbeing. You can book an appointment with one of our psychologists in Melbourne or via telehealth to discuss what you’re experiencing.

This article provides general information only and is not a substitute for individual medical advice. GLP-1 medications are prescription medicines and decisions about starting, changing or stopping medication should be discussed with your prescribing healthcare professional.