Hi, My son is 6 years old, diagnosed recently type 1. We have been using the FS Libre for 3 months now. We had problems with the system recently, so we've been comparing the Libre readings with his Accu-chek Aviva Expert monitor readings over the weekend. He's on 7 units Lantus in the morning (better control than giving at night) and between 1:20 & 1:15 ratio novorapid at least in the morning This morning, he had Cheerios for breakfast. It's high GI so we give 1.5 units about 10 minutes before and another unit when it starts spiking. On the Libre the last few weeks that process has seen it go up to about 10 then come down nice and smoothly to the 5's throughout the morning. No blood pricks needed at all. Today, About 45 minutes after eating breakfast, his libre said 12 and an arrow going up. We did a blood check which showed 8!! Libre 10 minutes later (my wife teaches at the same school so she did a check in the playground before the class went in) showed 13 still going straight up. We thought the Libre would show the levels coming down nearer to 8 within about 15 minutes. My question is, why the huge difference between sensor and monitor? Is it the high GI? Does it affect BG and interstitial wotsits differently? The numbers for everything else were so similar last night and early this morning, within a 0.3 mmol/l of each other. I would greatly appreciate any input on this, Thank you all.