Can Hormonal Changes Make Weight Loss Harder?

Can Hormonal Changes Make Weight Loss Harder?

If you feel as though losing weight has become harder despite making similar efforts to those that worked in the past, hormones may be one part of the explanation.

Hormones help regulate appetite, blood sugar, sleep, stress, reproduction and how the body stores and uses energy. Changes in these systems can influence hunger, energy levels, body fat distribution and how easy it feels to maintain healthier habits.

Hormonal changes do not make weight loss impossible, but they can make the process more complicated for some people.

Menopause, polycystic ovary syndrome, thyroid conditions and certain other hormonal disorders can all affect weight.

Understanding what may be happening is more useful than assuming that a lack of progress simply means you are not trying hard enough.

How Do Hormones Affect Body Weight?

Hormones are chemical messengers produced throughout the body.

Several of them influence processes that are relevant to weight management, including:

Hunger and fullness Blood sugar regulation Fat storage Energy expenditure Sleep Stress Muscle mass Reproductive health

Body weight is still influenced by the balance between the energy we consume and the energy our bodies use, but hormones can affect both sides of that equation.

For example, hormonal changes may increase appetite, disrupt sleep or reduce energy levels, making it more difficult to maintain an eating and activity routine.

Can Menopause Make Weight Loss Harder?

It can.

Weight gain is common during perimenopause and menopause, particularly around the abdomen and upper body. The NHS recognises weight gain as a common symptom during this stage of life.

Falling oestrogen levels appear to influence where body fat is stored.

However, menopause is rarely the only factor.

Ageing can also be associated with:

Gradual loss of muscle Reduced physical activity Changes in sleep Changes in appetite Lower daily energy expenditure Increased stress Lifestyle changes

This means it is often a combination of hormonal change, ageing and lifestyle factors rather than one hormone suddenly causing weight gain.

Why Does Belly Fat Often Increase During Menopause?

Many women notice that their body shape begins to change during perimenopause and menopause.

Fat may increasingly accumulate around the abdomen rather than the hips and thighs.

This is sometimes called central or abdominal fat distribution.

There are several reasons this may happen, including changes in oestrogen, age related changes in body composition and reduced muscle mass.

Abdominal fat is worth paying attention to because higher levels of visceral fat, which sits around internal organs, are associated with increased metabolic and cardiovascular risk.

That does not mean that every change around the waist is dangerous, but it is one reason weight management during and after menopause can be about health as well as appearance.

Does HRT Cause Weight Gain?

This is a common concern.

There is little evidence that most types of hormone replacement therapy cause weight gain.

The NHS notes that weight gain often occurs around menopause regardless of whether someone uses HRT.

HRT may be prescribed for menopausal symptoms where clinically appropriate, but it should not be viewed primarily as a weight loss treatment.

Whether HRT is suitable is an individual medical decision based on symptoms, health history, risks and preferences.

Can PCOS Make Weight Loss More Difficult?

Yes, for some people.

The NHS now refers to the condition previously known as polycystic ovary syndrome as polyendocrine metabolic ovarian syndrome, or PMOS. However, PCOS remains the term many people recognise and search for.

The condition can involve changes in hormones including insulin and testosterone.

Common symptoms can include:

Irregular periods Increased facial or body hair Acne Fertility difficulties Tiredness Weight gain Difficulty losing weight

The NHS specifically lists weight gain or difficulty losing weight among the possible symptoms.

What Does Insulin Resistance Have to Do With PCOS?

Insulin is a hormone that helps move glucose from the bloodstream into cells where it can be used for energy.

Some people with PCOS have insulin resistance, meaning the body's cells do not respond to insulin as effectively as expected.

The body may then produce more insulin to compensate.

This can affect appetite, blood sugar regulation and fat storage and may contribute to weight gain in some people.

It does not mean weight loss is impossible.

It may, however, explain why two people following apparently similar routines can have very different experiences.

You can read more in our guide:

PCOS and Weight Loss: Why It Can Be Harder and What Helps

Can an Underactive Thyroid Cause Weight Gain?

Yes.

An underactive thyroid, known medically as hypothyroidism, occurs when the thyroid gland does not produce enough thyroid hormones.

These hormones help regulate metabolism.

Possible symptoms include:

Tiredness Feeling unusually cold Weight gain Constipation Difficulty concentrating Low mood Dry skin or hair Changes to periods

The NHS advises speaking to a GP if you think you may have an underactive thyroid. Diagnosis usually involves blood tests.

Does Having an Underactive Thyroid Mean You Cannot Lose Weight?

No.

Once hypothyroidism is appropriately diagnosed and treated, weight management is still possible.

However, untreated thyroid disease can make weight management more difficult.

This is why persistent weight gain alongside symptoms such as significant tiredness, feeling cold, constipation or changes to your skin and hair should not simply be dismissed as a lifestyle issue.

Do not start thyroid medicines or supplements unless they have been recommended by an appropriate healthcare professional.

What About Cortisol?

Cortisol is often called the stress hormone.

That description is slightly simplistic because cortisol has many important functions within the body.

It helps regulate:

Stress responses Blood pressure Blood sugar Metabolism Inflammation

Normal day to day stress does not automatically mean you have abnormally high cortisol or a hormonal disorder.

However, prolonged stress can indirectly make weight management harder by affecting sleep, appetite, food choices and activity.

Can High Cortisol Cause Weight Gain?

Persistently excessive cortisol can occur with Cushing's syndrome, although this is rare.

Cushing's syndrome can cause increased body fat around the stomach, chest, neck and upper back, alongside symptoms such as muscle weakness, easy bruising and changes in mood.

Most people who gain weight around their stomach do not have Cushing's syndrome.

If there are other unusual symptoms or a doctor has reason to suspect a hormonal disorder, appropriate testing can be arranged.

Can Hormones Make You Hungrier?

Yes.

Appetite is regulated by a complex system involving the brain, digestive system and several hormones.

This is one reason hunger is not simply a matter of willpower.

The body has mechanisms designed to encourage us to eat when energy availability falls.

After weight loss, some people experience increased hunger and stronger food cues, which can make maintaining a lower weight challenging.

Sleep, stress, menstrual cycles and menopause may also influence appetite.

Feeling hungrier does not mean you have failed. It may mean your weight management approach needs to account for appetite rather than relying entirely on restriction.

Can Your Period Affect Your Weight?

Yes, although short term changes on the scales are often caused by fluid rather than body fat.

Hormonal changes during the menstrual cycle can influence:

Fluid retention Appetite Food cravings Digestion Energy levels Mood

It is therefore quite normal for weight to fluctuate across the month.

A sudden increase on the scales before a period does not necessarily mean you have gained that amount of body fat.

This is one reason looking at longer term weight trends can be more useful than reacting to individual daily measurements.

Does Poor Sleep Affect Hormones and Weight?

Sleep is another important part of the picture.

Poor sleep can influence appetite, energy and decision making.

Someone who is exhausted may:

Feel hungrier Experience stronger cravings Have less energy for physical activity Rely more heavily on convenient food Find planning meals more difficult

Menopause can make this particularly relevant because night sweats and other symptoms may disrupt sleep. The NHS notes that sleep problems are common during perimenopause and menopause.

Improving sleep will not automatically cause weight loss, but it can make other weight management behaviours easier to maintain.

Does Age Affect Weight Loss Too?

Yes.

Not every change that occurs around menopause or middle age is hormonal.

As people get older they may gradually lose muscle, particularly if they are not doing regular resistance activity.

Muscle requires energy to maintain.

Changes in muscle mass, activity levels and lifestyle can therefore influence how much energy someone uses each day.

The NHS also lists being over 55 and being menopausal or perimenopausal among factors that can make maintaining a healthy weight more difficult.

Why Is Strength Training Useful?

Resistance exercise can help maintain and build muscle.

That becomes increasingly important with age and during weight loss.

Examples include:

Weight training Resistance bands Body weight exercises Squats Lunges Press movements Pull movements

You do not need to become a bodybuilder.

The aim is to give your muscles a reason to remain strong.

Combining resistance exercise with sufficient protein and a balanced diet can be particularly useful when trying to reduce body fat while preserving muscle.

Should You Eat Less If Your Hormones Have Changed?

Not necessarily.

Responding to a lack of progress by repeatedly cutting food intake lower and lower can be difficult to maintain and may leave you hungry, tired and frustrated.

A better approach is often to examine the whole picture.

Consider:

Your overall eating pattern Portion sizes Protein intake Fibre Snacking Drinks and alcohol Sleep Daily movement Resistance exercise Stress Medicines Existing health conditions

For some people, what appears to be a hormonal problem may actually be a combination of several smaller factors.

For others, an underlying medical condition genuinely needs investigation.

When Should You Speak to a Doctor?

Consider speaking to your GP or another appropriate healthcare professional if you are gaining weight unexpectedly or experiencing other symptoms alongside it.

These might include:

Significant fatigue Feeling unusually cold Major changes to periods Excessive facial or body hair New acne Fertility problems Muscle weakness Easy bruising Significant changes in mood Symptoms of menopause that are affecting everyday life

Testing every hormone simply because weight loss is slow is not usually necessary.

A clinician can look at your symptoms and decide whether particular investigations are appropriate.

Can Prescription Weight Management Treatment Help?

Prescription weight management medicines may be considered for some adults who meet the relevant criteria.

They are not specifically treatments for menopause or general hormonal imbalance.

However, someone experiencing difficulty managing their weight because of several interacting factors may potentially be considered for medical weight management if they meet the appropriate eligibility criteria.

Meeting BMI or other eligibility criteria does not guarantee that medication will be prescribed.

Medical history, current medicines, existing conditions and individual risk all need to be assessed by the prescribing clinician.

You can read more in:

Who Can Be Prescribed Weight Loss Medication in the UK?

and

Weight Management Belfast: Where Can You Get Support?

NICE recommends that prescription medicines for weight management are used alongside dietary and physical activity measures rather than as a complete replacement for them.

What Can Help With Weight Loss During Hormonal Changes?

There is no special hormone balancing diet required for most people.

The fundamentals remain useful, but they may need to be adapted to your circumstances.

Prioritise Protein

Protein can help with fullness and contributes to maintaining muscle.

Useful sources include:

Eggs Fish Chicken Lean meat Greek yoghurt Cottage cheese Beans Lentils Tofu Include Fibre

Fruit, vegetables, whole grains, beans and pulses can help make meals more filling and support digestive health.

Increase fibre gradually if your current intake is low.

Keep Moving

Walking and general daily movement matter.

You do not need every activity session to be intense.

Add Resistance Exercise

Strength based activity becomes particularly valuable as we age because it helps protect muscle and bone health.

The NHS recommends regular exercise during menopause, including weight bearing and resistance activity.

Protect Your Sleep

A regular sleep routine can make appetite and energy easier to manage.

If menopausal symptoms are repeatedly disrupting your sleep, speak to a healthcare professional about the treatment options available.

Avoid Extreme Diets

Very restrictive diets can produce rapid initial changes but may be difficult to sustain.

The objective should be an approach you can realistically continue.

Hormones Matter, But They Are Not the Whole Story

There are two unhelpful extremes when discussing hormones and weight.

One is claiming:

"Hormones have nothing to do with weight."

The other is claiming:

"Your hormones control everything and dieting cannot work until you balance them."

Neither reflects how complicated body weight actually is.

Hormones can influence appetite, metabolism, sleep, body composition and fat distribution.

At the same time, food intake, physical activity, ageing, genetics, medicines, environment and behaviour also matter.

Weight management is usually the result of several interacting factors rather than one single hormone.

The Bottom Line

Hormonal changes can make weight loss harder for some people.

Menopause, PCOS, an underactive thyroid and rarer hormonal conditions can all influence body weight or how easily it can be managed.

But struggling to lose weight does not automatically mean that you have a hormone problem.

If your weight has changed alongside other symptoms, a healthcare professional can help determine whether investigation is appropriate.

For many people, the most effective approach combines realistic nutrition, regular activity, adequate protein, resistance exercise, good sleep and support that reflects their individual health.

Where prescription weight management treatment is being considered, this should always follow an appropriate clinical assessment.

Keltoi Wellness is a doctor led telehealth service providing weight management support for adults in Northern Ireland. All decisions regarding prescription treatment are made independently by the treating doctor following an individual clinical assessment.

Health information provided by Keltoi Wellness is for general education and does not replace individual medical advice, diagnosis or treatment.