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The Earth Beneath Your Feet is Medicine

06th May 2026

Why stepping outside may be the best prescription for a disordered gut and a body running out of sync with its own clock. 

There is a moment outside, perhaps you are in your morning walk, surrounded by low light and birdsong, that your body visibly settles. You feel your muscles relax and your breath deepens. You could attribute this to being out in nature or the fresh air, but the biology running quietly in the background is considerably more interesting than given credit for.  

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The human gut houses somewhere in the region of 100 trillion microbial organisms that outnumber our own cells. This gut microbiome not only assists digestion, but it also trains the immune system, regulates inflammation and communicates directly with the brain through the vagus nerve.  

When the gut microbiome thrives, we tend to thrive. When disrupted, the consequences ripple through every one of your bodies systems.  

The clock within the clock 

The past decade of research has emerged that the microbiome does not only exist, but it also oscillates. The gut bacteria wax and wane with regularity over a 24-hour period in a rhythm that is controlled by the same biological clock that regulates sleep, cortisol and metabolism.  

The gut has its own circadian clock which is actively in tune with the cues the body receive from the external environment – primarily light, temperature, meal timing and physical movement. When these cues are scrambled, the rhythm frays.  

The busyness of modern life, the relentless indoor sedentary office roles, late night eating and shift work can have detrimental effects on your rhythm. Effects of this fray can be dysregulated appetite hormones, reduced immune function and disrupted sleep which then further dysregulates the microbiome.  

The forest is your pharmacy 

The natural environment offers direct exposure to microbial biodiversity. Urban and suburban environments are, microbiologically speaking, impoverished. The soil, leaf litter, water and air of rural landscapes carry extraordinary concentrations of environmental microorganisms. Research in the field of biodiversity hypothesis (the work of Finnish immunologist Tari Haahtela) suggests that reduced environmental microbial exposure is a key driver of the epidemic of inflammatory and autoimmune conditions.  

Barefoot contact with soil, the inhalation of forest air, physical proximity to plants, livestock and water are, from the immune system's perspective, essential forms of education. The microbiome learns who its friends are and what constitutes a genuine threat, through contact with the living world. 

Movement and meal timing 

Circadian recovery doesn’t happen through light exposure alone. Physical movement (such as aerobic exercise conducted in natural light) generates a cascade of short-chain fatty acid production in the gut, feeds beneficial bacterial species and reduces the inflammatory signalling that disrupts gut barrier integrity.  

Sleep, of course, is not optional. It is during consolidated, darkness-anchored sleep that the gut rests, repairs its lining and the microbiome undergoes its nightly compositional shift. The person who sleeps poorly, eats erratically, and spends their days under fluorescent light is waging a slow and largely unconscious war against their own ecosystem.  

Retreats can provide resolutions 

The difficulty with circadian and gut health interventions is that they require environmental change, not merely behavioural change. It is not enough to decide to go to bed earlier. The light environment, the food environment, the stress environment, and the social environment all need to move in concert. This is why a structured residential retreat, set within genuinely wild and biodiverse surroundings, represents something qualitatively different from a fitness programme or a dietary plan. It removes the person from the conditions that are making them unwell and inserts them, temporarily but completely, into conditions that support recovery.