Stress: The Silent Saboteur of Your Health

Why chronic stress is not just mental, but metabolic

April marks Stress Awareness Month, a campaign led by the Stress Management Society to highlight the growing impact of stress on health and daily life.

Stress is often dismissed as part of modern living. Busy schedules, poor sleep, constant demands. It is normalised to the point where many people no longer question it.

The data suggests we should.

The scale of the problem

In the UK, stress is not a minor issue. It is one of the leading drivers of ill health.

According to the Health and Safety Executive:

• 875,000 workers reported work-related stress, depression or anxiety (2022 to 2023)

• Stress accounts for 49% of all work-related ill health

• It is responsible for 17.1 million working days lost each year

The Mental Health Foundation also reports:

• 74% of UK adults have felt overwhelmed by stress in the past year

• Around 1 in 3 people experience high or extreme stress regularly

This is not simply about feeling under pressure. It is a widespread physiological burden.

What stress is actually doing in the body

Stress activates the hypothalamic–pituitary–adrenal (HPA) axis, leading to the release of cortisol.

In the short term, this is adaptive. It mobilises energy, sharpens focus and helps us respond to immediate demands.

The issue is chronic activation.

Persistently elevated cortisol has measurable effects on multiple systems:

• Increased blood glucose

• Reduced insulin sensitivity

• Altered appetite regulation

• Disrupted sleep patterns

• Increased abdominal fat storage

Research shows that dysregulated cortisol patterns are associated with poorer glycaemic control and higher HbA1c levels, particularly in those already at risk of metabolic dysfunction (Hackett & Steptoe, 2017).

Stress and blood sugar: not just about food

One of the most overlooked aspects of metabolic health is that:

Blood sugar can rise in the absence of food.

Cortisol increases circulating glucose by:

• Stimulating gluconeogenesis in the liver

• Reducing glucose uptake into cells

• Interfering with insulin signalling

This means that even with a well-structured diet, chronic stress can contribute to:

• Elevated fasting glucose

• Energy instability

• Increased cravings

From a clinical perspective, this is often the missing explanation when progress stalls despite “doing everything right”.

Why stress makes weight loss harder

Stress does not just influence how we feel. It directly affects the body’s ability to lose fat.

Increased appetite and food preference

Elevated cortisol is linked with increased intake of energy-dense foods, particularly those high in sugar and fat.

Insulin resistance

Chronic stress reduces insulin sensitivity, meaning more insulin is required to manage blood glucose. Elevated insulin promotes fat storage.

Central fat accumulation

Cortisol favours fat deposition around the abdomen, a key feature of metabolic syndrome.

Sleep disruption

Poor sleep further exacerbates insulin resistance, appetite dysregulation and fatigue.

Reduced metabolic flexibility

The body becomes less efficient at switching between fuel sources, favouring energy conservation over fat utilisation.

The link to metabolic syndrome

Metabolic syndrome is defined by a cluster of risk factors:

• Elevated blood glucose

• Increased waist circumference

• High blood pressure

• Abnormal lipid levels

Stress interacts with each of these.

Chronic activation of the stress response contributes to:

• Insulin resistance

• Visceral fat accumulation

• Blood pressure dysregulation

Large-scale research has also linked chronic stress with an increased risk of coronary heart disease (Kivimäki et al., 2012, The Lancet).

From a nutritional therapy perspective, stress is not a secondary issue. It is a central driver of metabolic dysfunction.

Practical ways to reduce stress (and improve metabolic health)

This is where generic advice often falls short. The aim is not simply to “relax”, but to reduce physiological load.

1. Regulate your circadian rhythm

Morning light exposure helps set cortisol rhythm and supports sleep quality, energy levels and glucose regulation.

2. Stabilise blood sugar

Irregular eating, under-eating and excessive caffeine increase stress hormone output. Regular, protein-rich meals reduce this burden.

3. Prioritise sleep

Sleep deprivation increases cortisol and reduces insulin sensitivity within a short timeframe. Consistency matters as much as duration.

4. Choose appropriate exercise

Excessive high-intensity training can compound stress. Walking, resistance training and moderate-intensity movement improve insulin sensitivity without excessive cortisol load.

5. Build in daily down-regulation

This is not optional. Effective approaches include:

• Slow, controlled breathing

• Time outdoors

• Epsom salt baths to support relaxation

• A structured wind-down routine in the evening

6. Reduce hidden stressors

Common contributors include:

• High caffeine intake

• Ultra-processed foods

• Blood sugar volatility

• Constant digital stimulation

Need Support?

Struggling with fatigue, cravings, stubborn weight or blood sugar spikes? Stress could be the missing piece. Left unchecked, it keeps sabotaging your health, no matter how “clean” you eat.

Why contact me?

I help clients tackle the root causes of metabolic issues with tailored support that includes:

• Reducing cravings and stabilising blood sugar

• Balancing stress and cortisol

• Lifestyle strategies that actually work for weight loss and energy

Take action today:

• Book a consultation: click the link below: https://calendly.com/jadavisr/30min

• Grab my free guide: “Reduce Cravings and Balance Blood Sugar” www.jdrnutrition.com/ebook

Stop guessing. Start fixing the real drivers of your health.

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Frequently Asked Questions

What is chronic stress?

Chronic stress refers to a prolonged and ongoing state of physiological stress where the body remains in a heightened state of alert. Unlike acute stress, which is short-lived, chronic stress keeps cortisol levels elevated and can disrupt multiple systems, including metabolism, sleep and hormone balance.

How does stress affect blood sugar levels?

Stress increases cortisol, which raises blood glucose by stimulating glucose production in the liver and reducing insulin sensitivity. This means blood sugar can rise even without food intake, making glucose control more difficult.

Why do I crave sugar when I am stressed?

Stress affects appetite-regulating hormones and increases the drive for quick energy sources. This often leads to cravings for high-sugar, high-fat foods, which provide short-term relief but can worsen blood sugar instability.

Does stress lead to belly fat?

Chronic stress is associated with increased abdominal fat storage. Cortisol promotes fat deposition around the midsection, which is more metabolically active and linked to higher health risk.

Can stress affect digestion?

Yes. Stress can reduce stomach acid production, alter gut motility and impact the gut microbiome. This may lead to symptoms such as bloating, reflux, constipation or diarrhoea.

How does stress affect sleep?

Elevated cortisol can disrupt the natural sleep-wake cycle, making it harder to fall asleep or stay asleep. Poor sleep then further increases stress hormones, creating a cycle that affects metabolic health.

Can reducing stress improve weight loss?

Yes. Lowering stress can improve insulin sensitivity, reduce emotional eating, support better sleep and create a more favourable hormonal environment for fat loss.

What are the signs that stress is affecting my health?

Common signs include:

• Persistent fatigue

• Poor sleep

• Increased cravings

• Weight gain, particularly around the abdomen

• Difficulty concentrating

• Digestive issues

How quickly can stress reduction make a difference?

Improvements in sleep, energy and mood can occur within a few weeks. Changes in metabolic markers such as blood glucose or weight tend to take longer and depend on consistency.

Is exercise always helpful for stress?

Not always. While movement is beneficial, excessive high-intensity exercise can increase cortisol further. The type, intensity and timing of exercise should match your current stress levels.

Does caffeine make stress worse?

In many cases, yes. Caffeine stimulates the nervous system and can increase cortisol levels, particularly in individuals who are already stressed or experiencing blood sugar instability.