Immunoglobulin A (IgA)
What This Test Measures
Mucosal immunity (gut, respiratory, urinary)
Conventional vs. Functional Optimal Range
The gap between these ranges is why you feel terrible with "normal" labs. Conventional medicine waits for disease. Functional medicine optimizes for health.
Gabriel's Take
IgA protects mucous membranes (gut, lungs, sinuses). Low IgA (<70) = recurrent infections (sinusitis, UTIs, gut issues). IgA deficiency is the most common immunodeficiency. High IgA (>400) = IgA nephropathy or chronic infection. Gabriel checks IgA in gut and sinus issues.
When This Test Is High
IgA nephropathy, chronic infections
When This Test Is Low
IgA deficiency (most common immunodeficiency), recurrent infections
Related Conditions
IgA deficiency, celiac disease, autoimmune conditions
Recommended Follow-Up
If low, avoid IgA-containing products; if high, rule out IgA nephropathy, infections
Related Tests in Inflammation / Immune
C-Reactive Protein (CRP) / hs-CRP
Inflammatory marker; predictor of cardiovascular disease
hs-CRP (High-Sensitivity C-Reactive Protein)
Sensitive inflammatory marker; cardiovascular risk predictor
ESR (Erythrocyte Sedimentation Rate)
Non-specific inflammation marker