Bill Reddy, LAc, Dipl. Ac.;
Eric Shadd, FDN-P
As integrative health practitioners, we’re trained to see the body as a dynamic web of interconnected systems, where balance is the key to health and well-being. Functional nutrition takes this philosophy a step further, offering a framework to decode the body’s signals and address root causes of complex conditions like long-COVID, chronic fatigue syndrome, gut dysbiosis, and Lyme disease.
We’ve come to think of functional nutrition’s core systems as a HIDDEN message: Hormones, Immune system, Digestion, Detoxification, Energy production, and Nervous system balance. These six domains are not just checkboxes; they are the orchestra that, when in harmony, creates a symphony of health. When one instrument falters, the whole performance suffers. And while the body is comprised of more than 30 systems, these six are the common areas where functional diagnostic nutritionists identify challenges.
Hormones: The Body’s Conductors
Hormones are the body’s master messengers, orchestrating everything from sleep and stress to metabolism and mood. In practice, we’ve seen how even subtle imbalances – say, a middling morning cortisol followed by an afternoon crash – can leave a person stuck to their bed at dawn and utterly depleted by midday.
This pattern, often missed in standard bloodwork, is a hallmark of chronic stress and underlies conditions like chronic fatigue and even persistent Lyme disease. Functional lab testing, such as diurnal salivary cortisol panels, reveals these hidden rhythms, allowing us to tailor interventions that restore hormonal harmony.
Immune System: The Silent Security Guard
The immune system is our frontline defense, but in chronic illnesses, it’s often either overactive or suppressed. Lyme disease, caused by Borrelia burgdorferi, can trigger autoimmunity or immune exhaustion, leaving patients vulnerable to opportunistic infections. Chronic fatigue may also involve immune dysregulation or mitochondrial dysfunction, with elevated cytokines signaling inflammation.
A functional approach uses tests like the lymphocyte subset panel or cytokine profiles to gauge immune activity. Nutritional interventions, such as omega-3 fatty acids, C 15, curcumin, ashwagandha,1 medicinal mushrooms, or zinc, can modulate immunity, calm inflammation or boost defenses as needed. Comprehensive stool testing can reveal imbalances in gut flora, which directly impact immune resilience. A healthy gut is, after all, the training ground for a robust immune response.
Digestion: The Root of Health
Hippocrates is often credited with the saying, “All disease begins in the gut.” The “spleen” school of classical Chinese medicine, which originated during the Jin-Yuan dynasty, similarly emphasized the central role of the spleen and stomach in maintaining overall health and wellness.
Recent research identifies our small intestine as the foundation of wellness, housing 70% of the immune system and influencing every other system. Poor digestion – whether from leaky gut, dysbiosis or food sensitivities – can exacerbate symptoms of chronic fatigue, Lyme and almost any health condition. Patients often report bloating, irregular bowels/IBS or food intolerances.
Comprehensive stool analyses or food sensitivity panels (IgG or IgA) can pinpoint issues like microbial imbalances or gluten sensitivity. Nutritional strategies including parasite cleanses, probiotics, prebiotics, or elimination diets, restore gut integrity, reducing systemic inflammation and supporting overall health. Adaptogenic herbs, mindfulness practices and tai qi or qigong can assist in promoting parasympathetic tone.
Detoxification: Clearing the Path
Our bodies are bombarded with toxins daily, from environmental pollutants and “forever chemicals” to alcohol and metabolic byproducts. In Lyme disease, bacterial die-off (Herxheimer reactions) can overwhelm detox pathways, worsening symptoms such as fatigue and joint pain. Chronic fatigue patients often show sluggish liver detox, with phase I and II pathways out of sync.
Tests such as a liver detoxification profile or an organic acids test can highlight where the body is struggling. Supporting detox with nutrients like N-acetylcysteine (NAC), bitters, milk thistle, or cruciferous vegetable extracts can lighten the toxic load and promote cellular repair, allowing the body to focus on healing. Adopting an anti-inflammatory diet can further reduce distractions to proper detoxification.
Energy: The Cellular Spark
Cellular energy production is often impaired in chronic health conditions. Mitochondrial dysfunction2-3 is a common underlying factor in chronic fatigue, long COVID and Lyme disease, where oxidative stress and nutrient deficiencies sap vitality.
Organic acids testing can help identify markers of inefficient mitochondrial function, while serum levels of CoQ10, magnesium, or vitamins B or D may indicate energy deficits. Advanced diagnostic tools like MeScreen offer deeper insights, revealing baseline mitochondrial energy production, energy balance (such as overreliance on sugar metabolism), oxidative stress levels, and mitochondrial communication (with CDR, or cell danger response, serving as a key marker in chronic illness).
Functional nutrition approaches focus on supporting mitochondria through targeted supplements – such as C 15, L-carnitine, alpha-lipoic acid, or D-ribose – alongside redox signaling molecules and an antioxidant-rich diet to combat oxidative stress. The result? Enhanced stamina, sharper mental clarity and a revitalized sense of well-being.
Nervous System: The Master Regulator
The nervous system ties it all together, governing stress responses, sleep and cognitive function. In chronic fatigue, the autonomic nervous system often tilts toward sympathetic overdrive, disrupting sleep and recovery. Lyme disease can inflame the nervous system, causing neurological symptoms like memory issues or neuropathy.
Heart rate variability (HRV) testing or neurotransmitter metabolite panels can assess nervous system balance. Nutritional interventions such as magnesium,4 GABA-supportive amino acids or adaptogens5 like ashwagandha, can calm an overactive nervous system, promoting restorative sleep and mental clarity. Retraining systems such as Primal Trust, which emphasizes body-up somatic techniques to retrain the nervous system, can be the first step in actual healing.
It may not have caused the insult, but nervous system regulation balance is often a critical early phase of recovering from illness.
Addressing Complex Conditions
Chronic fatigue and Lyme disease are not single-system disorders; they’re symphonies of dysfunction across the HIDDEN framework. A patient with chronic fatigue might present with low cortisol, gut dysbiosis, and mitochondrial stress, while a Lyme patient could have immune overactivation, toxic overload from bacterial die-off, and neuroinflammation. Functional nutrition shines here by addressing the whole picture. For example, a protocol may combine gut-healing nutrients, mitochondrial support and nervous system calming agents, tailored to lab findings.
The Power of Lab Testing
Lab testing is the compass that guides functional nutrition. Beyond the tests mentioned, others like the comprehensive metabolic panel (CMP) or complete blood count (CBC) provide a baseline, while specialized tests like a comprehensive stool analysis or GI-MAP for gut health, or heavy metal panels for detox capacity, offer deeper insights. These tests allow us to move beyond guesswork, crafting precise interventions that align with the patient’s unique physiology.
The HIDDEN Message
Functional nutrition’s HIDDEN message is clear: The body is an interconnected whole, and chronic conditions demand a holistic approach.6 By assessing and supporting Hormones, Immune System, Digestion, Detoxification, Energy, and Nervous System, we can address the root causes of complex illnesses like chronic fatigue and Lyme disease.
As integrative health professionals, we’re uniquely positioned to refer to functional nutritionists and physicians skilled in functional medicine to help our patients reclaim their health. Let’s listen to the body’s signals, use targeted testing, and unlock the healing potential of functional nutrition.
References
- Reddy B. “Ashwagandha Offers Support During Stressful Times.” Integrative Practitioner, September 2020.
- Reddy B. “Long COVID and Altered Mitochondrial Function. A Therapeutic Regimen to Help Restore Homeostasis and Relieve Symptoms.” Acupuncture Today, February 2023.
- Reddy B. “Help your Patients Achieve Optimal Energy and Wellness – A Roadmap for Mitochondrial Health.” Acupuncture Today, February 2025.
- Reddy B. “Achieving Optimal Health Through Transdermal Magnesium Therapy.” Acupuncture Today, July 2012.
- Reddy B. “Performance-Enhancing Herbs.” Acupuncture Today, October 2010.
- “The Hidden Hunger: Micronutrient Deficiencies.” The Institute for Functional Medicine, Feb. 29, 2024.
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