A CIRS panel is expensive, and most patients get it back with no interpretation beyond "these are high." Here's what each number is actually reporting.
This is an educational decoder, not a diagnosis. Interpretation requires a clinician who has your full history and exposure timeline.
The inflammation markers
C4a — the classic biotoxin signal
A complement split product released when the innate immune system activates. Elevated in biotoxin illness and also in Lyme, so it earns its meaning in context. Handling matters enormously: it must be spun and frozen quickly or you get a falsely high result. If your C4a came back wildly elevated from a walk-in draw station, re-run it properly before you build a story on it.
C3a — the Lyme flag
When C3a is elevated alongside C4a, the literature and clinical experience both point toward bacterial membranes — most commonly Borrelia. This single marker changes the treatment plan more than any other on the panel.
TGF-β1 — the remodeling and autonomic marker
Associated with tissue remodeling, T-regulatory cell dysfunction, and the dysautonomia flavor of CIRS (POTS-like symptoms, temperature dysregulation). Slowest to normalize. Do not panic when it lags — it almost always does.
MMP-9 — inflammation crossing into tissue
Matrix metalloproteinase-9 delivers inflammatory cytokines from blood into tissue. This is the marker most responsive to a low-amylose diet and high-dose omega-3s, and one of the fastest to move.
The regulatory hormones
MSH — the master regulator that's almost always low
Melanocyte Stimulating Hormone regulates inflammatory control, sleep architecture, gut mucosal defense, leptin signaling, and endorphin production. Low MSH is the fingerprint of chronic CIRS and explains the cluster patients describe: unrefreshing sleep, chronic pain amplification, gut dysfunction, weight resistance.
MARCoNS colonization suppresses it further — which is why nasal culture belongs in the workup.
VIP — the restorative endpoint
Vasoactive Intestinal Polypeptide regulates pulmonary artery pressure, inflammatory response, and hormone signaling. Low in advanced CIRS. Intranasal VIP is Shoemaker's final step, and it only holds when the building is clean and MARCoNS is cleared.
Leptin, ACTH/cortisol, ADH/osmolality
The metabolic and pituitary layer. Elevated leptin with weight resistance, dysregulated ACTH/cortisol pairs, and the ADH/osmolality mismatch that produces the "always thirsty, always in the bathroom, always dehydrated, static shocks" pattern.
VEGF — the capillary oxygen marker
Vascular Endothelial Growth Factor governs capillary perfusion. Low or dysregulated VEGF is why exertion feels catastrophic and recovery from mild activity takes days.
The genetic and exposure layer
- HLA-DR/DQ — the susceptibility haplotype. Explains why one person in a household gets sick. Run once; it never changes. Full explainer here.
- AGA (antigliadin antibodies) — often transiently positive; drives the three-month gluten-free trial.
- Urinary mycotoxins — GPL-MycoTOX or Vibrant. Measures the body burden.
- HERTSMI-2 / ERMI — measures the building. You need both sides of the equation.
How the numbers should move
| Marker | Typical direction | Typical timeline |
|---|---|---|
| MMP-9 | Down | 4–12 weeks |
| VEGF | Toward mid-range | 8–16 weeks |
| C4a | Down, slowly | 3–9 months |
| MSH | Up (last to recover) | 9–18 months |
| TGF-β1 | Down, slowest | 9–18 months |
| VIP | Up, often needs replacement | Final phase |
If nothing moves in 3–4 months, the honest differential is short: ongoing exposure, untreated MARCoNS, an unaddressed co-infection, or a binder that's not being absorbed/tolerated as prescribed.
What we add to this panel
Standard CIRS labs tell you the fire is burning. They don't tell you why your detox pathways are slow. We pair the panel with DNA and hair-epigenetic data (DNA Precision) so the drainage and methylation support is individualized rather than generic.
Related reading
Medically reviewed by Dr. Nicole Rivera, Integrative Medicine Practitioner. Last reviewed August 2026. Sources: Shoemaker RC, Surviving Mold (2010) and Biotoxin Illness protocol updates (2018–2024); Berndtson K (2013); Shoemaker RC, House D, Ryan JC, Neurotoxicology and Teratology / Health proteomics papers on transcriptomic and biomarker patterns in CIRS. This article is educational and is not a diagnosis or a treatment plan. Biotoxin protocols require clinician supervision.
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