Sleep apnoea is often seen as a mechanical issue, simply requiring a CPAP machine or oral appliance, but in my experience, it is often a symptom of deeper physiological imbalances.
In this article, I want to explore how a functional medicine approach can help uncover the underlying drivers of sleep apnoea, particularly obstructive sleep apnoea (OSA), and how lifestyle interventions may support better breathing, sleep quality, and long-term health.
What is Sleep Apnoea?
Sleep apnoea is a condition characterised by repeated interruptions in breathing during sleep. These pauses can last from a few seconds to over a minute and may occur dozens or even hundreds of times per night. The most common type is obstructive sleep apnoea (OSA), where the airway collapses or becomes blocked during sleep.
People with sleep apnoea often wake up feeling unrefreshed, experience excessive daytime sleepiness, and may snore loudly or gasp for air at night. Over time, poor oxygenation and sleep fragmentation can increase the risk of cardiovascular disease, high blood pressure, insulin resistance, depression, and cognitive decline.
Conventional treatment often involves the use of a CPAP (Continuous Positive Airway Pressure) machine to keep the airway open. While this can be effective for symptom management, it does not address the underlying causes contributing to airway instability or systemic inflammation.
Who Does It Affect and Why?
Sleep apnoea affects millions of people worldwide and becomes more common with age. In the UK, it is estimated that around 1.5 million people suffer from OSA, though many remain undiagnosed. Men are more likely to be affected, particularly those over the age of 40. Women may be underdiagnosed, especially post-menopause when risk increases.
Risk factors include being overweight, having a larger neck circumference, nasal congestion, hypothyroidism, or a family history of sleep apnoea. However, sleep apnoea also occurs in individuals without excess weight, indicating that there are often multiple contributors at play.
Root Causes and Contributing Imbalances
From a functional medicine perspective, sleep apnoea is not simply a mechanical issue but often a symptom of deeper physiological imbalances. These may include:
- Excess weight, particularly around the neck and abdomen, can increase pressure on the airway during sleep.
- Insulin resistance and poor blood sugar regulation, which can contribute to weight gain and fluid retention in the neck tissues.
- Chronic inflammation, which may affect airway tone and central breathing regulation.
- Imbalanced nervous system, which can affect how well the body controls breathing during sleep, making it harder to maintain steady and healthy breathing patterns.
- Hormonal imbalances such as low thyroid function or low testosterone, both of which are associated with increased sleep apnoea risk.
Functional Medicine Testing and Assessments
When working with clients experiencing sleep apnoea, I aim to understand not just the symptoms but the underlying metabolic and physiological imbalances that may be contributing. Functional medicine testing helps us build a clearer picture.
Key lab tests and assessments I consider include:
- Fasting insulin and glucose: Elevated insulin is associated with fluid retention and soft tissue swelling, including around the airway.
- Lipid panel (including triglycerides and HDL): Sleep apnoea is frequently linked to metabolic syndrome, and lipid imbalances may signal deeper dysfunction.
- hs-CRP (high sensitivity C-reactive protein): Helps assess the level of chronic inflammation that may be contributing to airway instability or cardiovascular risk.
- Thyroid panel (TSH, Free T3, Free T4 & thyroid antibodies): Hypothyroidism is a recognised contributor to sleep apnoea due to its effects on tissue swelling and muscle tone.
- Cortisol and adrenal rhythm testing: Imbalances in the stress response can alter sleep quality and breathing patterns.
- Sex hormone testing (e.g. testosterone, oestradiol, progesterone): Low testosterone in men has been associated with increased risk of sleep apnoea, while postmenopausal women may also experience higher rates of sleep-disordered breathing due to hormonal shifts that affect muscle tone and airway function.
- Body composition analysis: Looking beyond weight and understand what your levels of overall body fat and visceral fat are.
These markers help us understand not only the physiological drivers of sleep apnoea but also how to prioritise our interventions. Our aim is to shift the body away from dysfunction and into balance.
Five Functional Medicine Approaches to Managing Sleep Apnoea
In functional medicine, we build a strategy that targets both root causes and lifestyle habits contributing to airway obstruction or disrupted sleep.
1. Weight management and metabolic health
For many people, excess visceral fat and insulin resistance play a central role in obstructive sleep apnoea. Rather than relying on unsustainable crash diets, I focus on:
- Supporting sustainable fat loss through targeted nutrition
- Encouraging daily movement and resistance training
For clients we work with in clinic, we include regular body composition analysis to have clearly defined goals and to track progress with body fat changes, visceral fat and muscle mass levels.
2. Anti-inflammatory, nutrient-dense nutrition
The goal is to reduce inflammation, support airway tissues, and improve sleep quality.
Key focuses include:
- Optimising the quality, quantity and type of carbohydrates, fats and proteins consumed.
- Emphasising colourful, antioxidant rich plant-based foods.
- Including therapeutic foods that have been shown to help regulate inflammation.
- Emphasising the most nutrient dense foods that have the highest bioavailability of vitamins and minerals.
3. Sleep hygiene and circadian alignment
Simple behavioural changes can significantly improve sleep quality and quantity:
- Keeping a consistent sleep-wake time.
- Avoiding bright lights and screens 1–2 hours before bed.
- Managing stimulants like caffeine total and timing or alcohol consumption.
- Establishing a calming evening routine and a morning routine that helps to set manage the body clock naturally.
4. Stress regulation
Chronic stress can worsen inflammation, disrupt breathing patterns, and lower vagal tone. We may integrate:
- Mindfulness or breathwork practices.
- Adaptogenic herbs where appropriate to help regulate stress response.
- Coaching to support lifestyle behaviour change in a realistic and non-overwhelming fashion.
5. Movement and breathing retraining
Exercise improves insulin sensitivity, reduces weight, and improves respiratory strength. In some cases, techniques such as breath retraining (e.g. Buteyko Method or slow nasal breathing) may support improved breathing mechanics during rest.
The Vicious Cycle Between Sleep Apnoea and Metabolic Health
One of the most important concepts I explain to clients with sleep apnoea is how it rarely exists in isolation. Instead, it often sits at the centre of a self-perpetuating cycle that involves weight gain, insulin resistance, systemic inflammation, and poor recovery.
Sleep apnoea disrupts normal sleep and oxygen delivery. This has downstream effects on how your body manages glucose, stress hormones, and fat storage.
Repeated overnight oxygen dips and fragmented sleep can:
- Increase insulin resistance and impair glucose tolerance
- Raise cortisol levels, driving abdominal fat storage, if one is in a calorie surplus
- Increase hunger hormones, and decrease satiety hormones
- Reduce motivation and energy for exercise
- Disrupt thyroid and sex hormones, impairing metabolism
This creates a vicious cycle where sleep apnoea worsens metabolic health and poor metabolic health, in turn, increases the severity of sleep apnoea. For example, fat around the neck and abdomen physically narrows the airway, while insulin resistance impairs nervous system regulation of breathing during sleep.
Without intervention, this cycle can accelerate the development of conditions like:
- Type 2 diabetes
- Hypertension
- Fatty liver disease (NAFLD)
- Cognitive decline
- Cardiovascular disease
This is where a functional medicine approach is so powerful, not because it offers a quick fix, but because it helps break this cycle at multiple levels. By improving sleep quality, reducing inflammation, supporting hormone regulation, and improving metabolic function, we can reduce the severity of sleep apnoea while also restoring energy, focus, and metabolic resilience.
Natural support is not about replacing CPAP or medical therapy when needed but about reducing the burden on the airway and body so that long-term reliance on devices may be reduced or symptoms better managed.
Conclusion
Sleep apnoea is far more than just snoring. Left unaddressed, it can chip away at your energy, mood, metabolism, and long-term cardiovascular health. But rather than viewing it as something you simply must live with, a functional medicine approach invites a different question, why is it happening in the first place?
By identifying and addressing the root causes, whether that’s inflammation, poor metabolic health, nutrient deficiencies, or sleep-disrupting habits, you can begin to reclaim your nights and improve your days.
If you’re looking for a more personalised and integrative way to manage your sleep apnoea, I invite you to explore how we can work together. Visit my Functional Medicine page to learn more about how we can assess, test, and support your unique needs.
Get in touch
If you would like to learn more about how I use Functional Medicine to help my clients achieve their health goals, why not book a FREE Discovery Call or get in touch via the form below.
References
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