Microbiome composition & prebiotic substrate
One of 5 mechanistic pathways to 🦠 Gut health & digestion · 14 options
The colonic microbiome ferments what you cannot digest into short-chain fatty acids that feed the gut lining and regulate immunity system-wide. Diversity is the most consistent marker of a healthy community — and the important caveat is that everything here worsens small-intestinal overgrowth.
Blood cannot see your microbiome. What it can show is the downstream consequence — B12 is partly bacterially produced, and systemic inflammation tracks with dysbiosis.
hs-CRP (High-Sensitivity C-Reactive Protein)Vitamin B12Folate, SerumComprehensive Metabolic Panel (CMP)🌱 Gut Health & Absorption covers these in one panel →
What engages this pathway
Ordered by how directly each one acts on the mechanism above — never by how much trial evidence exists. Each links to its full breakdown with dosing, half-life and vendor.
🧬 Probiotic
Effects are strain-specific and not transferable between products. Real trial evidence exists for particular strains in particular conditions; 'a probiotic' as a category claim does not.
🧬 High-Potency Probiotic
Multi-strain, high-CFU coverage. Most useful after antibiotics or acute disruption.
🧬 Saccharomyces boulardii
A yeast, so antibiotics don't kill it — which makes it uniquely useful concurrently with a course, and it has strong meta-analysis support for antibiotic-associated and C. difficile diarrhoea.
🧬 Bacillus Coagulans
A spore-former that survives stomach acid and shelf storage. Trial evidence in IBS.
🧬 Akkermansia muciniphila
Lives in the mucus layer and stimulates its production. Abundance correlates inversely with obesity and metabolic disease, and a human pilot with the pasteurised form showed metabolic improvement — one of the most mechanistically specific probiotics available.
🧬 Inulin
Chicory prebiotic that selectively feeds bifidobacteria. Also the most likely thing here to cause severe bloating if you have overgrowth.
🧬 Galactooligosaccharides (GOS)
Prebiotic with the best trial evidence for bifidobacterial increase, and generally better tolerated than inulin.
🧬 Partially Hydrolysed Guar Gum (PHGG)
Uniquely low-fermentation prebiotic — the one that is usually tolerated in IBS and even used alongside SIBO treatment.
🧬 Resistant Starch
Reaches the colon undigested and is the most potent butyrate-producing substrate available.
🧬 Acacia Fibre
Slowly fermented, so less gas per gram. A gentle entry point.
🧬 Fiber (FiberMend)
A blended prebiotic formulation spanning several fermentation rates, which spreads short-chain fatty acid production along more of the colon than a single fibre does.
🧬 Psyllium Husk
Bulking and viscous rather than heavily fermented — works for both constipation and diarrhoea, which is unusual and useful.
🧬 Gut Health Stack
Bundle spanning barrier, microbiome and enzyme support.
🧬 Greens Powder
Polyphenol diversity feeds microbial diversity. Not a vegetable substitute.
The other 4 routes to gut health & digestion
Pick the pathway that matches where you are actually stuck. An appetite drug does nothing for someone who already undereats.
Want the protocols behind these?
Dosing schedules, stacking, cycle timing and Coach Cam's notes live inside the Academy — plus the full interactive Vault.
Join the Academy — $10/mo →← Open this pathway in the interactive Vault
Frequently asked questions
The colonic microbiome ferments what you cannot digest into short-chain fatty acids that feed the gut lining and regulate immunity system-wide. Diversity is the most consistent marker of a healthy community — and the important caveat is that everything here worsens small-intestinal overgrowth.
14 options are mapped to this pathway in the Vault, including Probiotic, High-Potency Probiotic, Saccharomyces boulardii, Bacillus Coagulans. They are grouped by the mechanism they act through rather than ranked by how much trial evidence exists — 12 carry clinical validation and 1 are mechanistic predictions.
Blood cannot see your microbiome. What it can show is the downstream consequence — B12 is partly bacterially produced, and systemic inflammation tracks with dysbiosis. The markers worth checking are hs-CRP (High-Sensitivity C-Reactive Protein), Vitamin B12, Folate, Serum, Comprehensive Metabolic Panel (CMP).
Unproven is not the same as ineffective. Of the 14 options on this pathway, 12 have clinical validation and 1 are graded theoretical — meaning the mechanism is sound but the specific human trial has not been run, which is true of a great deal of what works in this space. Nothing on this page is ordered by evidence tier, because sorting by trial count would bury the compounds you came looking for.