Why Am I So Exhausted?

By Libby Herdman, Registered General Nurse (RGN), Integrative Health Practitioner & Amino Acid Therapy Practitioner

"I'm exhausted all the time."

It's one of the most common things I hear from people who come to see me.

They're often sleeping eight or nine hours a night, yet waking up feeling as though they haven't slept at all. They struggle to concentrate, rely on caffeine to get through the day and feel guilty because they simply don't have the energy they used to.

Many have visited their GP, had blood tests and been reassured that everything looks "normal." While this is good news, it can also leave people feeling frustrated, confused and wondering if it's "all in their head."

The truth is, persistent fatigue is never something to ignore.

Your body is incredibly intelligent. Exhaustion is often its way of asking you to slow down and pay attention.

Let's explore ten common reasons why you may be feeling so exhausted.

1. You're Running on Stress Hormones Instead of Energy

Modern life keeps many of us in a constant state of "doing."

When your nervous system spends too long in survival mode, your body prioritises producing stress hormones over repair and recovery.

You may feel:

• Wired but tired

• Unable to switch off

• Restless at night

• Anxious

• Constantly overwhelmed

Over time, this can leave you feeling physically and emotionally depleted.

2. You're Not Eating Enough Protein

This is something I see regularly.

Many people eat cereal for breakfast, a sandwich for lunch and pasta in the evening, yet consume very little quality protein.

Protein isn't just important for muscles.

It provides the amino acids your body needs to make:

• Serotonin

• Dopamine

• GABA

• Noradrenaline

These brain chemicals influence your mood, motivation, sleep, resilience and energy.

Without adequate protein, your brain simply doesn't have the raw materials it needs to function at its best.

3. Your Brain May Be Lacking Key Amino Acids

Amino acids are often called the building blocks of life, but they're also the building blocks of your brain chemistry.

For example:

Tyrosine helps produce dopamine and noradrenaline, supporting focus, motivation and mental energy.

Tryptophan is needed to produce serotonin, influencing mood, emotional wellbeing and healthy sleep.

Glutamine plays an important role in gut health and may help support people who experience stress-related sugar cravings.

Glycine supports connective tissue and may also promote relaxation and restorative sleep.

When amino acids become depleted—through chronic stress, poor nutrition, illness or prolonged demands—the body may struggle to maintain optimal function.

This doesn't mean everyone needs amino acid supplements. The key is identifying whether your individual symptoms suggest that targeted nutritional support may be appropriate.

4. You're Living on Sugar and Caffeine

When we're exhausted, we naturally reach for quick energy.

Coffee.

Chocolate.

Biscuits.

Energy drinks.

The problem is that these provide temporary stimulation rather than lasting energy.

Blood sugar rises...

Then crashes...

Leaving you feeling even more tired than before.

Learning how to balance blood sugar through protein-rich meals, healthy fats and fibre can make a remarkable difference to energy levels.

5. You're Deficient in Important Nutrients

Our bodies rely on hundreds of vitamins and minerals to produce energy efficiently.

Nutrients commonly associated with fatigue include:

• Iron

• Vitamin B12

• Folate

• Magnesium

• Vitamin D

• Zinc

It's important to identify deficiencies before taking supplements, as more isn't always better.

6. Your Gut May Not Be Absorbing Nutrients Properly

You can eat the healthiest diet in the world, but if your digestive system isn't functioning well, your body may struggle to absorb the nutrients it needs.

Digestive symptoms such as bloating, reflux, constipation or diarrhoea may indicate that your gut deserves further attention.

Good digestion is fundamental to good health.

7. Poor Sleep Quality

It's possible to sleep for eight hours but never reach deep, restorative sleep.

Factors that may affect sleep include:

• Stress

• Blood sugar imbalance

• Hormonal changes

• Alcohol

• Excess caffeine

• Nutrient deficiencies

• An overactive mind

Improving sleep isn't always about sleeping longer—it may be about sleeping better.

8. Hormonal Changes

Many women notice increasing fatigue during perimenopause and menopause.

Changing levels of oestrogen and progesterone can influence:

• Sleep

• Mood

• Brain function

• Blood sugar

• Energy

• Motivation

Supporting hormonal health often involves nutrition, lifestyle and nervous system regulation alongside any medical care you may be receiving.

9. You're Constantly Giving to Everyone Else

This is especially common among carers, healthcare professionals, parents and business owners.

You spend so much time looking after everyone else that your own needs quietly move to the bottom of the list.

Eventually, your body begins to protest.

Fatigue can sometimes be the body's way of asking for rest, nourishment and compassion.

10. You're Treating the Symptom Instead of Understanding the Cause

Perhaps the most important question isn't:

"How do I get more energy?"

It's:

"Why has my body become so exhausted?"

When we understand the root causes, we can begin supporting the body in the way it truly needs.

For some people that means improving sleep.

For others it's restoring nutritional balance.

For others it may involve addressing chronic stress, supporting gut health, improving blood sugar balance or exploring whether targeted amino acid therapy could be beneficial as part of a personalised programme.

No two people are the same.

My Approach

As a Registered General Nurse and Integrative Health Practitioner, I believe fatigue deserves curiosity, not judgement.

I take time to understand your health history, symptoms, nutrition, lifestyle, stress levels and overall wellbeing before making recommendations.

Together, we explore the possible contributors to your fatigue and create a personalised plan that may include dietary changes, nutritional support, nervous system regulation, lifestyle strategies and, where appropriate, carefully selected amino acids and supplements.

The aim isn't simply to mask your symptoms.

It's to understand why they've developed in the first place.

Final Thoughts

If you've recognised yourself in this article, please know that you're not lazy, weak or simply "getting older."

Your body may be asking for support.

Sometimes small changes in nutrition, lifestyle and nervous system health can make a profound difference. Sometimes further medical assessment is needed. The important thing is not to ignore persistent fatigue or assume it's something you just have to live with.

If you're ready to understand what your body may be trying to tell you, I'd be delighted to support you through a personalised consultation.

Together, we can explore the possible root causes of your fatigue and create a plan to help you regain your energy, resilience and wellbeing.