Understanding Chronic Fatigue Syndrome (ME/CFS): Causes, Gut Health, and Management in Dorchester

Medical Review by: Dr Mehrdad Bordbar BMBS MMedSc MRCGP AFMCP | Olivine Clinic, Dorchester

If you are experiencing a profound, relentless exhaustion that sleep simply does not fix, you are not alone. Chronic fatigue can completely disrupt your daily life, making even the smallest tasks feel like monumental hurdles.

What is the bottom line? Chronic Fatigue Syndrome (CFS), most accurately referred to as Myalgic Encephalomyelitis (ME), is a complex, long-term neurological and metabolic disorder. It is characterised by debilitating fatigue that worsens after minor physical or mental exertion—a symptom known as Post-Exertional Malaise (PEM). There is no single "cure-all" or exact known cause, but the latest 2026 clinical consensus shows that ME/CFS is multifactorial. It requires a highly personalised management plan focusing on cellular energy, gut health, lifestyle pacing, and targeted medical support to help you regain your quality of life.

Here is what you need to know about the science of ME/CFS, how your gut and cells play a role, and how we approach this condition at the Olivine Clinic in Poundbury, Dorchester.

What is Chronic Fatigue Syndrome (ME/CFS)?

You may have heard this condition referred to by several names. The medical community most commonly uses ME/CFS(Myalgic Encephalomyelitis / Chronic Fatigue Syndrome). In some international literature, it is also referred to as SEID(Systemic Exertion Intolerance Disease).

According to guidelines from the National Institute for Health and Care Excellence (NICE), a diagnosis of ME/CFS is usually considered when specific symptoms have been present for at least three months.

These core symptoms include:

• Debilitating fatigue that severely impacts your pre-illness ability to function.

• Post-Exertional Malaise (PEM), where symptoms flare up hours or days after physical or cognitive effort.

• Unrefreshing sleep or severe sleep disturbances.

• Cognitive difficulties, frequently described by patients as "brain fog."

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The Multifactorial Nature of ME/CFS

Why does someone develop ME/CFS? Current research from leading institutions indicates there is no single trigger. Instead, the condition is highly multifactorial, meaning a "perfect storm" of elements creates a persistent state of bodily stress and systemic inflammation.

Current Theories and Triggers

• Viral and Bacterial Infections: A significant number of cases begin after an acute infection. Viruses like Epstein-Barr (which causes glandular fever) and, more recently, SARS-CoV-2 (leading to Long COVID) are known triggers. The theory is that the immune system remains "switched on," leading to chronic inflammation and immune exhaustion.

• Genetics and Epigenetics: Some individuals may have a genetic predisposition that makes their immune or metabolic systems more vulnerable to external stressors.

• Hormonal Imbalances: Disruptions in the hypothalamic-pituitary-adrenal (HPA) axis—the body’s central stress response system—can lead to abnormal cortisol levels, deeply affecting energy and resilience.

• Life Stresses and Trauma: Severe psychological or physical stress can alter immune function and act as a catalyst for the onset of ME/CFS.

• Sleep and Nutrition: Chronic sleep deprivation and a nutrient-poor diet can severely compromise the body's ability to repair itself overnight, perpetuating the cycle of fatigue.

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The Energy Crisis: Mitochondria and Nutrition

To understand ME/CFS, we must look at the microscopic level: your cells.

Mitochondria are the "powerhouses" of your cells, responsible for producing ATP, which is the energy currency your body uses to function.

Recent studies suggest that people with ME/CFS experience significant mitochondrial dysfunction. Their cells struggle to convert food and oxygen into usable energy efficiently, which explains the profound physical exhaustion and PEM.

Nutritional intake plays a direct role here. Supporting your mitochondria requires a diet rich in specific micronutrients. For instance, incorporating antioxidant-rich fruits can help combat the "oxidative stress" that damages mitochondrial DNA. Berries (like blueberries and raspberries), pomegranates, and citrus fruits are excellent for providing the vitamins and polyphenols needed to protect and support cellular energy production.

The Gut Microbiome Connection

There is a powerful communication network between your digestive system and your brain, known as the gut-brain axis.

Emerging clinical research shows that the gut microbiome—the trillions of bacteria residing in your digestive tract—plays a starring role in immune regulation and energy metabolism.

Many patients with ME/CFS also suffer from gut-related symptoms, such as Irritable Bowel Syndrome (IBS), bloating, and food sensitivities. This is often due to gut dysbiosis (an imbalance of good and bad bacteria) and "leaky gut," where microbial toxins enter the bloodstream and trigger widespread inflammation.

Having comprehensive stool data to map your unique gut microbiome can be of great support. By pinpointing specific bacterial overgrowths or deficiencies, we can tailor a management plan that helps the gut lining, reduces systemic inflammation, and ultimately supports the body to utilise its energy for efficiently.

Broad Management of ME/CFS: A Personalised Approach

Because ME/CFS varies so widely from person to person, there is no one-size-fits-all treatment. The NICE guidelines strictly advise against graded exercise therapy (GET) pushing patients beyond their limits. Instead, management is highly individualised, focusing on symptom relief and energy conservation (pacing).

A broad, functional management approach may include:

• Targeted Supplementation: Based on blood and cellular testing, we may use medical-grade supplements to support mitochondrial function.

• Microbiome Support: Using prebiotics, probiotics, and targeted dietary changes to resolve gut dysbiosis and improve nutrient absorption.

• Acupuncture: Many patients find acupuncture highly beneficial as a complementary therapy. It can help regulate the nervous system, alleviate chronic muscle pain, and improve sleep quality by shifting the body out of a "fight or flight" state.

• Energy Pacing: Learning to balance activity and rest to avoid triggering Post-Exertional Malaise.

Next Steps: Your Personalised Care Plan at Olivine Clinic

Navigating ME/CFS can feel overwhelming, but you do not have to do it alone. Resolving complex, multifactorial chronic illness requires patience, investigative medicine, and a collaborative doctor-patient relationship. Figuring out a personalised management plan that works for your specific biology typically takes about 3 to 6 months of dedicated work.

Ready to get to the root of your fatigue? If you are looking for an empathetic, science-based approach to chronic fatigue, we are here to help.

• Book an Extended Consultation: We highly encourage patients to book an extended appointment with Dr Mehrdad Bordbar at the Olivine Clinic. This allows us the necessary time to deeply explore your medical history, arrange advanced functional testing, and design a bespoke recovery roadmap.

Contact us today to schedule your assessment: 📍 Olivine Clinic, 5 Hamslade Green, Poundbury, Dorchester, DT1 3DP

Disclaimer: The information provided in this article is for educational purposes only and does not constitute medical advice. ME/CFS is a complex medical condition. Individuals must undergo a proper medical assessment by a qualified healthcare professional to receive an accurate diagnosis and a safe, personalised management plan.