At what level below 20 ppm does Nima detect gluten?
Based on internal Nima testing, Nima has detected gluten at levels as low as 5 ppm (parts per million). If Nima detects gluten at any level, the "Gluten Found" message will appear on the device.
How frequently will Nima detect gluten below 20 ppm?
Given the complexity of the Nima system, the likelihood of detecting below 20 ppm is difficult to estimate at this time.
There are many factors that affect Nima's potential to detect below 20 ppm. The two most important factors are food weigh and availability of gluten within the sample. Nima is designed to control for these factors through the design of the capsule and the user instructions, but since we don't know those specifics for each sample, detection below 20 ppm is sporadic.