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SugarMD - I Tested OTC VS Medical CGMs (Dexcom vs Stelo vs Libre vs Lingo) | SugarMD

Thumbnail of the video “SugarMD - I Tested OTC VS Medical CGMs (Dexcom vs Stelo vs Libre vs Lingo) | SugarMD”
Community upload. AI output has not been independently verified.
Author: SugarMD
Categories: Health Nutrition
Tags: health, nutrition
Views: 2 · Last viewed: 2026-10-17 06:30 UTC

Short Summary

Main recommendation: Of the over-the-counter continuous glucose monitors tested, the Stelo (Dexcom's over-the-counter CGM) is the preferred choice, with the Dexcom G7 as the reliable prescription-grade counterpart. The speaker found the Libre and Lingo (over-the-counter Libre 3) sensors less reliable, with the Lingo and Libre sensors failing early while the Dexcom and Stelo kept working. All devices gave readings close to a finger-stick check, though the speaker says, based on his own experience, that they can read falsely low at low blood sugar ranges.

Key Points

  • In a single-person test, the Stelo read 120, the Dexcom 125, and the Libre 119, compared with 117 on a Contour Next finger-stick meter, so all passed on numbers.
  • The over-the-counter Lingo failed the next day, so the speaker could not keep monitoring with it, and the Libre sensor died three days after application.
  • The Dexcom and Stelo sensors were still working on about day four or five, which the speaker cites as the reliability difference.
  • At low blood sugar ranges, Dexcom and Libre (and their over-the-counter versions) tend to show readings lower than actual, which the speaker, based on his own experience, describes as false-positive lows.
  • The Stelo and Lingo are both reported to last about 14 to 15 days, while the Dexcom G7 lasts about 10 days.

Details Worth Noting

  • Concrete instructions: Apply the Dexcom and Stelo by placing the applicator against the skin and pressing the button. The Libre sensor screws in without a button, and the Lingo requires lining up the green and gray lines, placing it on a table, and smashing it before pressing against the arm.
  • Concrete instructions: For a finger-stick check, ensure there is some blood, warm the hand if cold, prick the side of the finger, let the blood come out gradually without squeezing hard, and avoid eating anything sweet beforehand.
  • Concrete instructions: Sensors are described as taking 30 minutes to an hour to activate after application.
  • The speaker noted the Lingo sensor was about three times the size of the Stelo, and the Libre and Dexcom sensors were similar in size to each other.
  • The speaker bled during the Libre application and said the Dexcom and Stelo did not hurt, though the Libre insertion caused bleeding that stopped after holding pressure.
  • The speaker also mentioned a possible future video on methods to extend Dexcom sensor life.

Bottom Line

Across this single-person test, the Dexcom and Stelo sensors were the most durable, and the Stelo was the speaker's pick among over-the-counter options, though the results come from one user and a short period.