Over-the-counter continuous glucose monitoring sensors now cost about $50 and last two weeks.
The sensor takes glucose readings every five minutes and transmits data every fifteen minutes to a smartphone app.
Data can be exported by linking the app to Apple Health and converting the XML export to CSV.
Users noted unexpected glucose spikes after some meals and observed that even a brisk walk effectively lowers blood sugar.
The sensor adheres securely and is shower-safe, but its adhesive begins to degrade after about a week.
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