Can a positive celiac blood test be wrong? Understanding false positives
                                
                                
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                                    4 min read                                
                            
                                According to the National Institutes of Health, while celiac blood tests are highly reliable, around 2-3% of people with celiac disease can have negative serologic test results. This also means that a positive celiac blood test can be wrong, as false positives are possible due to other health conditions or testing inaccuracies.