← fallow.garden Corridor II • Human Biology
Natural History of your Gut Biome

The Multitudes Within

“Do I contradict myself? Very well then I contradict myself, (I am large, I contain multitudes.)”

This app contains an explanation of what is happening inside your digestive tract, followed by an interactive simulator to see how your daily choices affect your internal ecosystem. Lastly, we provide a field guide introducing all the main microbial players and metabolic currencies.

Titled after Walt Whitman’s Song of Myself and inspired by Ed Yong’s seminal work I Contain Multitudes: The Microbes Within Us and a Grander View of Life.

An introduction to the science of your gut biome can sometimes feel a bit overwhelming. You can choose between three different depth levels: Level 1 (Meadow) offers an easy-to-understand intuitive introduction; Level 2 (Physiology) dives into systems physiology and cellular mechanics; and Level 3 (Deep Taxa) lets you truly geek out on the underlying scientific taxa and biochemistry.

Select Depth Lens:

1. The Passage: From Mouth to Mucosa

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2. The Living Soil Sandbox

Weekly Botanical Diversity 30 species
Digestive Rest Window 16 hours
Live Fermented Foods 1 serving / day
Ecological Disturbance
Mucus Layer Thickness --

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Short-Chain Fatty Acid Yield --

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Microbial Richness Index --

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Endotoxin Leakage Risk (LPS) --

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3. Keystone Inhabitants & Currencies

Active Utilities in Corridor II

Apply the principles of this field guide across our companion micro-utilities:

🌿 About fallow.garden & Feedback

fallow.garden is an independent anthology of single-purpose micro-utilities created to counter cognitive fatigue, algorithmic noise, and relentless optimization culture. Each tool runs entirely on your device with zero tracking or account friction.

Have ideas for new restorative modules, suggestions for current tools, or questions about the underlying research? Feedback and contributions are always deeply appreciated.