Fatigue, persistent low energy or exertional intolerance, alongside gut symptoms requires standard medical workup before microbiome interpretation. Anaemia from occult GI blood loss, celiac disease, IBD, thyroid dysfunction, and sleep disorders are common explanations that stool sequencing does not detect.
Reports linking fatigue to dysbiosis, LPS, or low butyrate producers extrapolate from metabolic and cohort studies, not from validated fatigue endpoints on your panel.
Before anything else, clinical workup first
With a clinician, consider screening for:
- Anaemia (iron, B12, folate), especially with diarrhoea or celiac risk
- Thyroid disease (TSH)
- Celiac serology if compatible symptoms
- Diabetes or metabolic disturbance
- Depression, sleep apnoea, medications
- Inflammatory GI disease if diarrhoea, blood, weight loss, calprotectin
See Red flags.
Decision tree, after basic labs
| Pattern | Think about | Read next |
|---|---|---|
| Elevated calprotectin, GI inflammation | IBD workup | IBD vs functional, Calprotectin |
| Diarrhoea + weight loss + anaemia | Malabsorption, IBD, celiac | Clinical pathway, not report-first |
| Fatigue after gastroenteritis, ongoing IBS | Post-infectious overlap | Post-infectious IBS |
| IBS + poor sleep / stress | Gut–brain axis overlap | Stress, sleep & exercise |
| Report cites LPS / endotoxemia | Research association in metabolic cohorts | Metabolic health & LPS, not individual diagnosis |
| Report cites leaky gut / low butyrate | Indirect | Intestinal barrier, SCFAs |
Evidence-tier table, framing only
| Approach | Evidence tier | Notes |
|---|---|---|
| Treat anaemia, thyroid, celiac, IBD when found | Strong | Before supplement stacks |
| Calprotectin + clinical assessment for inflammatory features | Strong | Gut inflammation markers |
| Sleep hygiene / CBT / activity (IBS comorbidity) | Moderate for symptom clusters | Stress, sleep & exercise |
| Low-FODMAP if IBS symptoms drive quality of life | Strong for IBS endpoints | Low-FODMAP |
| Probiotics for fatigue from report | Weak | Strain-specific; not fatigue indication |
| Microbiome test explains fatigue | Low | Reading your report |
What consumer microbiome reports cannot establish
| Question | Can sequencing answer it? |
|---|---|
| Am I anaemic or hypothyroid? | No |
| Do I have celiac disease? | No |
| Is fatigue from LPS translocation? | No, blood markers research-only |
| Will a probiotic improve energy? | No |