sIgA detection levels

Secretory IgA (sIgA) is the most common antibody found in the gut. It plays an important role in:
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- Protecting against harmful microbes
- Keeping inflammation in check
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Your report shows sIgA levels based on the limit of quantification (the range where results can be measured reliably).
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- Very low values (between about 26–149) are difficult to measure accurately and may look misleading if reported as exact numbers.
- This is why we only report levels once they’re in the range where the test is highly reliable.
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sIgA gives useful insight into how well your gut’s immune defences are functioning.
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​https://doi.org/10.1038/mi.2011.41