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Search and find answers to frequently asked questions about FreeStyle Libre systems.

What does LO mean when it appears after users scan the reader over the Sensor?

If LO appears on the reader when users scan the reader over the Sensor, it means the reading is lower than 40 mg/dL (2.2 mmol/L). Users can touch the message button for more information. Users should check their blood glucose on their fingertip with a test strip. If users get a second LO they should contact their healthcare professional immediately.
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