Gut
Microbiome, mucosal lining
The gut is both a barrier and an ecosystem — a single-cell-thick lining that has to absorb nutrients while keeping bacteria and toxins out, plus the trillions of microbes that ferment what you can't digest. Fiber is the load-bearing input: it's the fuel your microbiome turns into short-chain fatty acids like butyrate, which in turn feed the gut lining itself. L-glutamine is the preferred fuel of those lining cells, and zinc + vitamin A maintain the tight junctions between them. A low-fiber diet starves the microbiome and thins the mucosal barrier — the upstream event behind 'leaky gut' and much systemic inflammation.
How your supplements + diet cover this system right now — the nutrients feeding it, where the gaps are, and your own lab readouts.
The load-bearing nutrients — if these are deficient, this system shows symptoms first. Click any to see daily targets, top food sources, and supplements that supply it.
Lab markers that report on this system’s health.
Save a lab session under My Journey → Biomarkers to see your own values for these.
Where the biochemistry happens for this system.