Interfering Substances - Abbott FreeStyle Libre 2 User Manual

Interfering Substances

Taking ascorbic acid (vitamin C) supplements while wearing the Sensor
may falsely raise Sensor glucose readings. Taking more than 500 mg of
ascorbic acid per day may affect the Sensor readings which could cause
you to miss a severe low glucose event. Ascorbic acid can be found in
supplements including multivitamins. Some supplements, including cold
remedies such as Airborne® and Emergen-C®, may contain high doses of
1000 mg of ascorbic acid and should not be taken while using the Sensor.
See your health care professional to understand how long ascorbic acid is
active in your body.
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