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Rewilding urban home yards may benefit human microbiome and inflammatory response in just three months

Reducing yard maintenance to increase natural plant diversity may enhance exposure to environmental microbes, potentially supporting immune health by improving human microbiome diversity and lowering inflammation within a few months.

NeoMD Editors · 2026-10-20 · 02:39 AM EDT

For information, not personal medical advice. Discuss treatment decisions with a qualified clinician.

The quick read

Key takeaways

Rewilding urban yards by reducing gardening and chemical use boosts exposure to native plants and soil microbes, potentially enriching the human microbiome.
Increased microbial diversity in home environments may influence immune responses and inflammatory markers within three months, though evidence is still emerging.
Current research is limited by small study sizes, short durations, and lack of demonstrated causality; long-term impacts and optimal rewilding levels remain uncertain.

Editorial illustration for Rewilding urban home yards may benefit human microbiome and inflammatory response in just three months — AI-generated editorial illustration.

Modern urban lifestyles have led to significant loss of natural biodiversity in home environments, limiting human exposure to diverse environmental microbes. Scientists believe this reduced contact may contribute to the rise of immune-related conditions such as allergies, asthma, and type 1 diabetes.

What is rewilding?

Rewilding urban yards means deliberately allowing native plants and natural soil microbes to flourish by decreasing frequent gardening and chemical use. This increases the variety of microbes people come into contact with at home.

Evidence supporting benefits

Studies suggest that increasing microbial diversity in living spaces can positively influence the human microbiome—the collection of microbes living on and in our bodies—and modulate immune responses. Some research has reported changes in inflammatory markers and microbiome composition after short periods of increased exposure to natural environments.

Supporting editorial illustration for Rewilding urban home yards may benefit human microbiome and inflammatory response in just three months — AI-generated editorial illustration.

Limitations and uncertainties

While initial findings indicate benefits within as little as three months, most evidence comes from a small number of studies with limited participants and short follow-up times. It remains unclear how lasting these effects are and how much rewilding is needed. Also, studies to date mostly show correlations rather than direct cause-effect relationships.

More rigorous, long-term human studies are needed to verify how rewilding impacts specific immune-mediated diseases or overall health outcomes.

Implications for urban residents

Allowing parts of urban yards to naturalize might be a simple step to promote microbial diversity exposure. However, individuals should consider local environmental and allergy factors. This approach is not a treatment but a potential way to support immune system regulation.

Source: Medical Xpress