Immunoglobulin A (IgA)
What It Is
IgA is an antibody that plays a crucial role in mucosal immunity, protecting the linings of the respiratory and digestive tracts.
Why It Matters
IgA levels help assess immune function and can be relevant in coeliac disease screening.
If Levels Are High
Elevated IgA may indicate chronic infections, liver disease, or autoimmune conditions.
If Levels Are Low
Low IgA (selective IgA deficiency) is common and usually asymptomatic but can increase susceptibility to infections.
Preparation
No special preparation required.
How Often to Test
As clinically indicated.
Important Disclaimer
This information is for educational purposes only and does not constitute medical advice or diagnosis. Results should be interpreted in clinical context by a qualified healthcare professional. If you have severe symptoms or urgent concerns, seek urgent medical help.