CGMs Without Diabetes (2026): Stelo vs Lingo vs Nutrisense Compared

Over-the-counter continuous glucose monitors are now available in the US for adults without diabetes. We compare Stelo by Dexcom, Lingo by Abbott, and Nutrisense on price, accuracy, app experience, and what the science actually says about wearing one.

By Symptom Advisory Editorial Team — last reviewed August 18, 2026 — 13 min read

Key Takeaways

• Stelo (Dexcom) and Lingo (Abbott) are the first OTC CGMs FDA-cleared for US adults without diabetes, both around $89/month.
• Nutrisense bundles cleared sensors with dietitian coaching at $250-$400/month for people who want guided interpretation.
• CGMs in healthy adults are a self-experimentation tool, not a diagnostic — diabetes thresholds do not transfer cleanly.
• All three are HSA/FSA eligible in the US but not covered by Medicare or most commercial insurance for non-diabetic use.

For decades, continuous glucose monitors (CGMs) were prescription-only medical devices used almost exclusively by people with type 1 or insulin-treated type 2 diabetes. That changed in March 2024, when the US Food and Drug Administration (FDA) cleared the first over-the-counter (OTC) CGM — Dexcom Stelo — for adults 18 and older who do not use insulin. Abbott followed weeks later with the OTC clearance of Lingo and Libre Rio. Suddenly, anyone with a credit card could wear a sensor that streams glucose readings to their phone every few minutes.

This guide compares the three CGM systems most US adults are choosing between in 2026 — Dexcom Stelo, Abbott Lingo, and Nutrisense (which now ships Stelo or Libre sensors bundled with a coaching app) — on price, accuracy, wear time, app experience, and what the published research actually says about wearing a CGM if you do not have diabetes.

Why people without diabetes are wearing CGMs

The marketing pitch is straightforward: see how meals, sleep, stress, and exercise affect your blood sugar in near-real time, then use that feedback to eat and move differently. The biological pitch is more nuanced. Glucose variability — large spikes and crashes after meals — has been associated in observational studies with cardiometabolic risk markers, but the evidence that lowering postprandial glucose in metabolically healthy adults improves long-term outcomes is still limited.

A 2024 narrative review in Nutrients and a 2023 American Diabetes Association (ADA) Standards of Care position both note that CGM use in people without diabetes can produce useful behavioral insights but should not be used to diagnose dysglycemia, because reference ranges and clinical thresholds were established in patients with diabetes.

Translation: a CGM can be a powerful self-experimentation tool, but a 140 mg/dL post-meal spike in a healthy adult is not the same warning sign it would be in someone with diabetes.

The three systems at a glance

All three options use a small filament inserted just under the skin on the back of the upper arm. The sensor measures glucose in interstitial fluid every minute or so and sends readings to a smartphone app via Bluetooth. None of them require fingersticks for calibration.

Where they differ is wear time, the underlying sensor, the price per month, and how much "coaching" is layered on top.

Prices are list prices as of early 2026; HSA/FSA eligibility applies to all three in the US.

Stelo by Dexcom

Stelo is the no-frills option from the company that already dominates prescription CGM in the US. The sensor is a slightly slimmed-down version of the Dexcom G7 hardware, with the same 15-day wear time and a similar reported mean absolute relative difference (MARD) of around 9–10% in Dexcom's submission data. Readings update every 15 minutes in the Stelo app (versus every 5 minutes on the prescription G7), which is a deliberate choice to nudge non-diabetic users away from minute-to-minute obsession.

The app focuses on daily and weekly summaries, "spike" detection, and a simple time-in-range view. There are no carb logging requirements and no coaching. At roughly $89 for a two-sensor (one-month) supply purchased without a subscription, Stelo is currently the lowest-friction way to try a CGM in the US.

Best for: people who want raw data and zero lock-in, and who are comfortable interpreting trends themselves.

Lingo by Abbott

Lingo uses Abbott's FreeStyle Libre 3 sensor platform with a separate consumer app designed around a proprietary "Lingo Count" metric — a daily score that penalizes large glucose excursions and rewards flatter curves. Wear time is 14 days and readings update every minute, the fastest of the three.

The Lingo app leans heavily on gamification: streaks, challenges, and educational content about metabolic health. Pricing is comparable to Stelo at around $89 per month for two sensors, with a small discount for a recurring plan. Lingo currently has the most polished onboarding and the clearest visual language for beginners, but the trade-off is a more curated view of the data — power users sometimes wish for more raw access.

Best for: first-time CGM wearers who want a guided, app-led experience and metabolic-health framing.

Nutrisense

Nutrisense is not a sensor manufacturer; it is a coaching service that ships you Abbott Libre or Dexcom Stelo sensors bundled with an app and access to a registered dietitian. Plans typically range from $250 to $400 per month depending on coaching frequency and contract length, with optional longer commitments lowering the monthly price.

What you get for the premium is human guidance. A credentialed dietitian reviews your data, responds to messages, and helps you design experiments — for example, swapping the order in which you eat carbs and protein to see how it changes your post-meal curve. For people who want accountability or who have specific goals (perimenopause, athletic performance, prediabetes prevention), the coaching layer can justify the cost. For purely curious wearers, it is overkill.

Best for: people who want a dietitian interpreting their data and who will not act on numbers without guidance.

What CGM data actually tells you (and what it does not)

A few things worth keeping in mind before reading too much into your first sensor:

• Interstitial fluid lags blood. CGM readings trail capillary blood glucose by roughly 5–15 minutes, especially during fast changes. A post-meal "spike" peaks later on a CGM than it would on a fingerstick.
• Single readings are noisy. The MARD for OTC CGMs is roughly 9–12%, which means a reading of 140 mg/dL could plausibly be anywhere from ~125 to ~155.
• Healthy spikes exist. Even metabolically healthy adults regularly hit 140–160 mg/dL after a large carb meal, especially in the morning. The 2023 ADA Standards of Care note that the diabetes-derived 140 mg/dL threshold should not be applied unchanged to non-diabetic populations.
• Sleep, stress, illness, and exercise all shift glucose independently of food. A bad night's sleep can raise fasting glucose by 10–20 mg/dL the next morning.

Used as a feedback loop rather than a diagnostic, a CGM can absolutely change behavior — multiple short trials have shown that wearing a sensor improves dietary self-monitoring and increases physical activity in the short term. Whether those changes persist after the sensor comes off is a different (and largely unanswered) question.

Insurance, HSA, and FSA in the US

Because Stelo, Lingo, and Libre Rio are OTC products marketed to people without diabetes, they are not covered by Medicare, Medicaid, or most commercial insurance plans as a medical benefit. They are, however, generally eligible for purchase with HSA and FSA funds, which effectively gives a 20–35% discount depending on your tax bracket. Nutrisense's coaching subscription is partially HSA-eligible — the sensor portion qualifies, the coaching may or may not depending on your plan administrator.

If you have a diabetes diagnosis or use insulin, you may qualify for a prescription CGM (Dexcom G7, FreeStyle Libre 3 Plus) covered under medical or pharmacy benefits, which is almost always cheaper than the OTC route.

How to choose

A simple decision tree most readers can follow:

• You just want to try a CGM and look at your own data: Stelo. Cheapest, longest wear time, no subscription.
• You want an app that interprets the data for you: Lingo. Cleaner UX, faster readings, gamified.
• You want a human looking over your shoulder: Nutrisense. Expensive but the coaching is real.

Most people get the majority of the insight from their first one or two sensors. A common pattern is to wear CGMs for one month, learn which meals and behaviors spike you, change a few things, and stop — rather than wearing one continuously.

The bottom line

OTC CGMs in 2026 are a legitimately useful self-experimentation tool, not a medical revolution. They will reliably show you which foods spike your blood sugar, how exercise blunts those spikes, and how poor sleep elevates your baseline. They will not diagnose disease, and the long-term evidence that lowering postprandial glucose in non-diabetic adults improves clinical outcomes is still developing.

If you are healthy and curious, Stelo is the cheapest entry point. If you want a coached experience, Nutrisense is the most credentialed option. If you want something in between, Lingo strikes a reasonable balance.

Practical Checklist

• Confirm you are 18+ and not using insulin (OTC CGMs are not for insulin users).
• Decide whether you want raw data (Stelo), guided app (Lingo), or coaching (Nutrisense).
• Check HSA/FSA eligibility through your plan administrator before purchasing.
• Plan to wear sensors for 2-4 weeks, not indefinitely — most insight comes early.
• Do not use CGM readings to self-diagnose diabetes or prediabetes; see a clinician for an A1C test.

Frequently Asked Questions

Do I need a prescription for Stelo, Lingo, or Libre Rio?

No. As of 2024, all three are FDA-cleared as over-the-counter products for US adults 18 and older who do not use insulin. You can buy them directly from the manufacturer websites or selected retailers without a clinician visit.

Are OTC CGMs covered by insurance?

Generally no. Medicare, Medicaid, and most commercial plans do not cover OTC CGMs for adults without diabetes. They are typically eligible for purchase with HSA or FSA funds, which provides a meaningful tax-based discount.

How accurate are these sensors?

Reported mean absolute relative difference (MARD) for OTC CGMs is roughly 9–12%, meaning a reading of 140 mg/dL could plausibly represent a true blood glucose anywhere from about 125 to 155. They are accurate enough for trends, but not for clinical decisions in someone with diabetes.

Is a post-meal spike to 140 mg/dL a problem if I am healthy?

Probably not. The 140 mg/dL threshold comes from diabetes diagnostic criteria. Metabolically healthy adults routinely cross 140 mg/dL after large carb meals, especially in the morning. The 2023 ADA Standards of Care explicitly caution against applying diabetes thresholds to non-diabetic CGM users.

Can a CGM diagnose prediabetes?

No. Prediabetes is diagnosed by HbA1c, fasting plasma glucose, or an oral glucose tolerance test, not by a wearable CGM. If your readings concern you, ask your clinician for those blood tests.

How long do sensors last?

Stelo lasts 15 days per sensor. Lingo and Nutrisense (Libre-based) last 14 days. All three are single-use and waterproof for showering and swimming.

Does wearing a CGM actually change behavior?

Short-term studies show CGM use improves dietary self-monitoring and increases physical activity for a few weeks. Whether the behavior change persists after removing the sensor is not well established.

Which CGM is best for athletes?

Stelo gives the most flexibility (raw data, lowest cost, longest wear). Lingo's faster readings are appealing for tracking workout responses. Nutrisense is overkill for most athletes unless you want a dietitian designing fueling experiments.

Sources & References

1. FDA Clears First Over-the-Counter Continuous Glucose Monitor — U.S. Food and Drug Administration link
2. 6. Glycemic Targets: Standards of Care in Diabetes—2023 — American Diabetes Association link
3. Continuous Glucose Monitoring in Healthy Adults: A Narrative Review — Nutrients (MDPI) link
4. Dexcom Stelo OTC CGM Product Information — Dexcom link
5. Lingo by Abbott Product Information — Abbott link
6. Accuracy of an OTC Continuous Glucose Monitor in Adults Without Diabetes — Journal of Diabetes Science and Technology link
7. Glycemic Variability in Healthy Adults: A Meta-Analysis — Diabetes Care link
8. HSA and FSA Eligible Medical Expenses — Internal Revenue Service (Publication 502) link

Medical disclaimer

This article is health information for education only. It is not medical advice, a diagnosis or a treatment plan. In an emergency, call 911. Researched and drafted with AI-assisted tools and fact-checked by a human editor against the sources listed above. How we create our content.