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What is a Trend Arrow? How does it work? And what does it tell me?

The FreeStyle Libre systems^ offer a Trend Arrow with each glucose reading which tells you which way and how quickly glucose levels are changing. So, at any given time, you not only know what your glucose level is currently, but also which way it is heading. Depending on the direction of Trend Arrow, you can find out if your glucose levels are going up, down or staying steady, facilitating better decision-making.

^ FreeStyle Libre and FreeStyle Libre 2 systems are part of the same family of products.