I have found this thread fascinating and helpful. I spoke to a nurse yesterday who looked at my phone app for the Libre. I am 97% in target and she said the 2 % lows, mainly 3,.8 would cause me permanent memory loss. I mentioned that non diabetics don't get memory loss from 3.8 and she said well you are different. I asked for the research so will see what she finds. She asked me to do better. I felt so good with my results and found her rather annoying! Oh well.