CGM product guides

Find the CGM worth your money.

Information on Dexcom, Abbott, Levels Health, Nutrisense and over-the-counter CGM options.

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Articles published
6
Products featured
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Devices we cover

Click for full review
⭐
Dexcom G7
Prescription CGM; check exact AID compatibility
🔵
FreeStyle Libre 3
Prescription CGM, 14-day wear
🟢
Dexcom Stelo
OTC CGM, no prescription, 15-day sensor
🟡
Abbott Lingo
OTC CGM, 14-day sensor, FreeStyle Libre platform
📱
Levels Health
CGM app & metabolic scoring
👩‍⚕️
Nutrisense
CGM + dietitian coaching

Latest reviews & guides

30 published
Review
Dexcom G7 Review 2026
Dexcom G7 review: intended use, accuracy data, app and wear, from manufacturer and FDA documents.
Review
FreeStyle Libre 3 Review 2026
FreeStyle Libre 3: check current manufacturer specifications and prices; separate study figures do not establish higher clinical accuracy.
Review
Dexcom Stelo Review 2026
The first OTC CGM from Dexcom. 15-day wear, no prescription needed.
Review
Abbott Lingo Review 2026
Glucose graph and Lingo Count; scores are not clinical targets
Review
Levels Health Review 2026
Levels Health: check current provider features and pricing for the service.
Review
Nutrisense Review 2026
CGM plus registered dietitian coaching.
Comparison
Levels Health vs Nutrisense
Compare membership, app features and tier-dependent clinician or nutrition support.
Guide
CGM Devices Compared — 2026
Compare named Dexcom, Abbott, Medtronic and OTC models by intended use and features.
Guide
CGM Without a Prescription — 2026
Stelo, Lingo, and subscription platforms compared. No doctor visit required.
Guide
Does Insurance Cover CGM?
Medicare, private insurance, prior authorization — and what to do if you're denied.
Guide
What is Time in Range?
How TIR complements HbA1c, time below range and variability.
Guide
Normal Blood Sugar After Eating
Post-meal glucose observations, clinical context and measurement limits.
Weight Loss
Can CGM Help You Lose Weight?
Small nutrition trials, glucose observations and the limits of weight-loss claims.
Weight Loss
Best CGM for Weight Loss 2026
Compare features and coaching without a proven weight-loss winner.
Diabetes
CGM for Prediabetes
Discuss glucose observations and symptoms with a qualified professional; a sensor trace alone does not establish a cause or health benefit.
Diabetes
CGM for Type 2 Diabetes
Which CGM is right for Type 2 — insulin vs non-insulin users explained.
Diabetes
CGM for Diabetes — Complete Guide
Type 1 and Type 2 diabetes management with CGM. Devices, insurance, and getting started.
Foundation
What is Continuous Glucose Monitoring?
How CGM devices work, who they're for, and what the research says.
Foundation
Metabolic Health & Glucose Optimization
Clinical markers of metabolic health and the limits of glucose-only observations.
Foundation
Metabolic Health 101
Historical population estimates and study-specific definitions.
Foundation
CGM Technology & How It Works
The science behind continuous glucose sensors — from electrochemical sensing to wireless transmission.
GLP-1
Ozempic and CGM: Why GLP-1 Users Are Turning to Glucose Monitors
Glucose observations to discuss with a prescriber; not a medication-efficacy test.
GLP-1
Best CGM for GLP-1 Users 2026
CGM options for people taking Ozempic, Wegovy or Mounjaro: OTC and prescription models and their labeling compared.
GLP-1
What is GLP-1? How These Medications Change Weight Loss
How Ozempic, Wegovy, and Mounjaro work — and what they do to your glucose and metabolism.
GLP-1
Wegovy vs Ozempic: What's the Difference?
Same drug, different doses and approvals. Which is right for weight loss vs diabetes?
Comparison
Dexcom Stelo vs Abbott Lingo 2026
The two OTC devices covered here: intended use, features and separate studies.
Guide
Best CGM for Athletes 2026
Device-specific activity features and limits; no proven performance benefit.
Guide
CGM for Intermittent Fasting 2026
What CGM data shows during fasting windows, and the display and logging features of the devices discussed.
Foundation
How to Read CGM Data
A beginner's guide to your glucose graph — axes, trend arrows, TIR, GMI, and what apps show differently.
Guide
CGM Accuracy Comparison 2026
Study-specific MARD data and why separate trials cannot rank clinical accuracy.

Medical source review, 25 October 2026. Sources apply to their named models, populations and endpoints: Stelo FDA K260935; Original Libre 3, Alva 2023; Libre 3 Plus manufacturer kit, page 5; Guardian 4 FDA, table 17; Eversense E3 US IFU; Eversense 365 ENHANCE; GMI original paper; TIR consensus; DCCT TIR analysis; NIDDK HbA1c.