Research Shows Many Probiotics Contain Traces of Gluten
Researchers at the Celiac Disease Center at Columbia University Medical Center analyzed 22 popular, high-selling probiotics and found that more than half of them (55%) contained gluten, according to research that will be presented on May 16 at Digestive and Disease Week in Washington DC.
Using a detection technique called liquid chromatography-mass spectrometry, the researchers measured the quantity of gluten in the probiotics.
Over 50% of the samples tested had gluten, sometimes even when labeled gluten-free
In general, for a product to be labeled “gluten-free,” the study authors note that gluten needs to be less than 20 parts per million. Their data show that most of the probiotics that contained gluten had less than that, but four brands contained more than the threshold. More than half of the probiotic brands tested by the researchers claimed to be gluten-free on their label.