N-Acetylglucosamine or GlcNAc is a derivative of glucose and is a substrate of OGT--one of the most commonly marked drug/treatment terms from the O-linked Glycosylation Disorders doc set. Because it is readily available for purchase, Matt Might tested the substance on himself before trying it on Bertrand with surprising results--Bertrand was able to produce some tears. Help us learn more about how GlcNAc can affect tear production by marking these docs. To hear more of the amazing story, checkout the video from the 2015 GoldLab Symposium: https://www.youtube.com/watch?v=_mAIqcb-2b0