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Mold 101 — Learn About Mold Illness

New to mold? Start here. We've compiled the essential resources to help you understand mold illness, how it's diagnosed, and what you can do about it.

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Free Mold Illness Guide

Get started with an introduction to mold-related illness and what to look for.

Read the Free Guide

Mold Risk Test

A free questionnaire to understand your exposure and health risk factors.

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Starter Health Panel

Blood test kit ($56) at LabCorp to measure key health biomarkers.

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About MoldCo: MoldCo is a clinician-led virtual clinic offering mold toxicity care guided by the Shoemaker Protocol. The Mold Report's editorial coverage is independent and AI-curated from public sources.

Essential Reading

Foundational research papers and books that define our understanding of mold-related illness.

Key Resources

Trusted external references for further learning and clinical guidance.

Understanding the Science

Brief explanations of key concepts in mold-related illness.

What is CIRS?

Chronic Inflammatory Response Syndrome (CIRS) is an acute and chronic inflammatory response to the presence of toxigenic organisms and their metabolites inside buildings. It may develop in susceptible individuals after repeated water-damaged building exposures, particularly in genetically susceptible individuals. Research suggests approximately 24% of the population may have genetic susceptibility to developing CIRS.

What are biomarkers?

Biomarkers are measurable indicators in your blood or body that reflect disease processes. Key mold-related biomarkers include TGF-β1 (a marker of immune dysregulation), MMP-9 (an indicator of vascular inflammation), and MSH (melanocyte-stimulating hormone, which plays a role in immune function). These markers help clinicians understand inflammatory patterns and track changes over time.

What is the Shoemaker Protocol?

The Shoemaker Protocol is a step-by-step, evidence-based approach to treating mold-related illness. It begins with exposure avoidance and assessment, continues with specific biomarker testing, and includes targeted care protocols guided by test results. The approach is designed to reduce inflammatory markers and support recovery.

Is mold illness real?

Yes. Mold-related illness is recognized by peer-reviewed medical literature and clinicians who specialize in environmental medicine. Research has established clear connections between water-damaged building exposure and specific health symptoms and biomarker changes. While diagnosis and treatment approaches continue to evolve, the underlying science is robust and supported by multiple clinical studies.