What's the best continuous glucose monitor (CGM) service for a non-diabetic person interested in metabolic health?
Data as of Sep 21, 2026 · Based on 361 AI responses from ChatGPT Search and Google AI Mode · See how Parse measures this
Data as of Sep 21, 2026 · Based on 361 AI responses from ChatGPT Search and Google AI Mode · See how Parse measures this
For a non-diabetic user, the best choice depends on whether you seek simple tracking or intensive guidance. 
Brands AI recommends here
Named in 76% of answers
The top choice for simple, over-the-counter monitoring. It is the first FDA-cleared sensor for non-insulin users, allowing direct purchase without a prescription for a 15-day view of your glucose trends.
Named in 72% of answers
Best for those needing structural guidance. It pairs hardware with personalized nutritionist support and app tools to optimize lifestyle habits, making it ideal if you want more than just raw data.
Named in 57% of answers
Named in 57% of answers
Source | Citation share |
|---|---|
 The Best Continuous Glucose Monitors of 2025 - Natural Endocrinology Specialistshttps://www.nesaz.com/the-best-continuous-glucose-monitors-of-2025/ | 5% |
 Best Continuous Glucose Monitors (CGM) for 2026 - CNEThttps://www.cnet.com/health/medical/best-continuous-glucose-monitors-according-to-experts/ | 4% |
Can You Use a CGM Without Diabetes? | Nutrisensehttps://www.nutrisense.io/what-is-a-cgm/benefits/without-diabetes | 3% |
 How Continuous Glucose Monitoring Benefits Non-Diabeticshttps://www.gitelcare.com/continuous-glucose-monitoring-for-non-diabetics-a-game-changer/ | 3% |
 6 Best Continuous Glucose Monitors for 2026: Most Accurate and Latest Devices Reviewedhttps://www.type1strong.org/blog-post/5-best-continuous-glucose-monitors-for-2025 | 3% |
 How to get a CGM without diabetes and what you can learn | Levels | Levelshttps://www.levels.com/blog/how-to-get-a-cgm-without-diabetes-and-what-you-can-learn | 3% |
 Best CGM for Non Diabetics 2026: Stelo vs. Lingo - Plotline Healthhttps://www.plotline.health/blog/best-cgm-for-non-diabetics-2026 | 2% |
 How to Get a Continuous Glucose Monitor OTC Without ...https://www.goodrx.com/classes/medical-supplies-and-devices/otc-cgm-for-non-diabetics | 2% |
 The Best Continuous Glucose Monitors | WIREDhttps://www.wired.com/gallery/the-best-continuous-glucose-monitors/ | 2% |
 Can You Get a Dexcom Without Diabetes? Benefits and Considerationshttps://aptivamedical.com/can-you-get-a-dexcom-without-diabetes/ | 1% |
If you're **non-diabetic and interested in metabolic health**, I'd separate the question into two parts: **which sensor is best** and **which service makes the data useful**. ### My practical shortlist Option | Best for | What you get
If you're non-diabetic and interested in metabolic health, I'd separate the question into two parts: which sensor is best and which service makes the data useful.
| Option | Best for | What you get |
|---|---|---|
| Dexcom Stelo | Most people who just want CGM data | OTC CGM, no prescription; relatively simple, lower-commitment approach |
| Abbott Lingo | Lifestyle experimentation | OTC CGM with a consumer-oriented app and coaching-style insights |
| Nutrisense | Want human guidance | CGM + app + optional registered-dietitian support |
| Levels | Data-heavy metabolic tracking | CGM data combined with food/activity logging and a broader metabolic-health platform |
| Signos | Glucose tracking tied to weight management | CGM + app focused heavily on nutrition/weight-related behavior |
The 2026 ADA Standards of Care list Dexcom Stelo and Abbott Lingo as the two OTC CGMs currently available in the U.S.; unlike prescription CGMs, they don't provide hypoglycemia alarms.
For a healthy person who wants to learn how their body responds to food, exercise, sleep, and stress, I'd start with Stelo rather than committing to a coaching subscription. It gives you the underlying glucose data without requiring a long-term service commitment.
If your real goal is "I want someone to help me interpret this and turn it into behavior changes," then Nutrisense becomes more interesting because its program combines a compatible CGM with nutrition tracking and access to registered dietitians.
One important caveat: CGM isn't currently an established screening or diagnostic tool for diabetes or prediabetes in otherwise healthy people. The ADA specifically says there is insufficient evidence to use CGM for screening/diagnosing prediabetes or diabetes. DOI So I'd treat it as a personal experimentation/behavior-feedback tool, not a medical test.
Also, don't get too fixated on individual "spikes." Glucose naturally fluctuates, and CGM readings aren't identical to blood-glucose measurements. If your goal is actually assessing metabolic health, periodic A1C, fasting glucose, lipids, blood pressure, waist circumference, and possibly fasting insulin can tell you things a CGM can't.
Bottom line:
If you tell me your age, whether you're trying to lose weight, improve energy/fitness, optimize diet, or detect early insulin resistance, and roughly what you'd like to spend per month, I can narrow these down based on those criteria.
The 2026 ADA Standards of Care list Dexcom Stelo and Abbott Lingo as the two OTC CGMs currently available in the U.S.; unlike prescription CGMs, they don't provide hypoglycemia alarms.
For a healthy person who wants to learn how their body responds to food, exercise, sleep, and stress, I'd start with Stelo rather than committing to a coaching subscription. It gives you the underlying glucose data without requiring a long-term service commitment.
If your real goal is "I want someone to help me interpret this and turn it into behavior changes," then Nutrisense becomes more interesting because its program combines a compatible CGM with nutrition tracking and access to registered dietitians.
One important caveat: CGM isn't currently an established screening or diagnostic tool for diabetes or prediabetes in otherwise healthy people. The ADA specifically says there is insufficient evidence to use CGM for screening/diagnosing prediabetes or diabetes. doi.org So I'd treat it as a personal experimentation/behavior-feedback tool, not a medical test.
Also, don't get too fixated on individual "spikes." Glucose naturally fluctuates, and CGM readings aren't identical to blood-glucose measurements. If your goal is actually assessing metabolic health, periodic A1C, fasting glucose, lipids, blood pressure, waist circumference, and possibly fasting insulin can tell you things a CGM can't.
Bottom line:
For a non-diabetic person focused on metabolic health, energy, and longevity, the CGM landscape has shifted away from expensive prescription workarounds toward **direct-to-consumer, over-the-counter (OTC) wellness CGMs** and **expert-backed metabolic coaching services**. The "best" choice depends on whether you want a…
For a non-diabetic person focused on metabolic health, energy, and longevity, the CGM landscape has shifted away from expensive prescription workarounds toward direct-to-consumer, over-the-counter (OTC) wellness CGMs and expert-backed metabolic coaching services.
The "best" choice depends on whether you want a straightforward, self-guided hardware option or a high-touch coaching program that analyzes the data for you.
If you just want to buy the hardware directly without a prescription or monthly coaching subscription, two dominant FDA-cleared OTC options exist for adults without diabetes:
Cost: ~$89–$99/month for a 30-day supply (two 15-day sensors).
Features: Reads glucose every 5 minutes. Clean, streamlined app that logs meals, exercise, and sleep. Integrates nicely with Apple Health, Oura Ring, and third-party apps.
Pros: Highly accurate, 15-day wear time per sensor, great third-party integrations, and available on both iOS and Android.
Best for: Tech-savvy users who want clean data and easy integration with fitness trackers like Oura or Apple Watch.
Cost: ~$84–$89/month (or single-sensor options available).
Features: Reads glucose every minute. Uses a "Lingo Count" / score system focused on limiting glucose spikes and building daily habit challenges.
Pros: Very frequent data tracking (every minute), behavior-coaching focus.
Cons: App ecosystem is currently more robust on iOS than Android; heavily focused on its own proprietary scoring metrics rather than raw data export.
Best for: Users who want a gamified, coaching-style app experience to curb snacking and meal-spike habits.
If looking at a squiggly line of glucose data leaves you wondering what to actually do about it , you can pair hardware with a metabolic health membership. These services include the sensors plus software analysis, and often human dietitian support:
To help narrow down the ideal pick, tell me:
**For a non-diabetic focused on metabolic health, I’d look at Nutrisense first** if you want interpretation and human coaching; it currently includes Stelo sensors plus 1:1 dietitian support. [Nutrisense](https://www.nutrisense.io/products/cgm-plans?utm_source=chatgpt.com) - **Nutrisense:** best if you want expert…
For a non-diabetic focused on metabolic health, I’d look at Nutrisense first if you want interpretation and human coaching; it currently includes Stelo sensors plus 1:1 dietitian support.
One caveat: evidence that CGMs improve health outcomes in people without diabetes is still emerging.
For non-diabetics focused on metabolic health, energy, and longevity, the landscape has changed dramatically. You no longer need to jump through hoops or get a workaround prescription.[](https://www.nutrisense.io/what-is-a-cgm/benefits/without-diabetes)…
For non-diabetics focused on metabolic health, energy, and longevity, the landscape has changed dramatically. You no longer need to jump through hoops or get a workaround prescription.
The "best" service depends on whether you want pure hardware (do-it-yourself) or a guided coaching program with dietitians.
If you just want the data without paying a monthly markup for coaching or apps telling you what to eat, direct-to-consumer OTC biosensors are your best bet. They require no prescription and cost significantly less than coached programs.
If you want deep-dive analytics, lifestyle correlation (sleep, exercise, stress), and access to registered dietitians to help you interpret the spikes, a guided program is superior.
Are you leaning more toward a standalone DIY sensor or do you want human dietitian coaching to help analyze your patterns?
If you’re **non-diabetic and mainly interested in metabolic health**, I’d pick **Dexcom Stelo + its native app** for most people. If you want substantial human coaching, **Nutrisense** is the better *service*. ### My ranking Option | Best for | My take
If you’re non-diabetic and mainly interested in metabolic health, I’d pick Dexcom Stelo + its native app for most people. If you want substantial human coaching, Nutrisense is the better service.
| Option | Best for | My take |
|---|---|---|
| Dexcom Stelo | Best overall / DIY | ⭐ Best value for most people |
| Nutrisense | Coaching + interpretation | ⭐ Best if you want a dietitian |
| Abbott Lingo | Nutrition/habit coaching | Great alternative to Stelo |
| Levels | Broader quantified-self ecosystem | Good, but harder to justify the premium |
Why Stelo: It's an FDA-cleared OTC glucose biosensor, so eligible adults don't need a prescription. Sensors last up to 15 days, and the app provides glucose trends, meal logging, insights and an AI coach.
Why Nutrisense: You're paying for interpretation rather than merely the sensor. Its current program includes two biosensors/month, AI insights, and access to 1:1 dietitian coaching; it starts around $179/month, with longer commitments advertised at lower monthly rates.
Lingo is particularly appealing if your primary question is “Which foods and habits work best for me?” Its app emphasizes nutrition and behavioral coaching, while the sensor lasts up to 14 days.
I'd start with Stelo for 30 days, rather than committing to a year-long CGM program.
Use it as a personal experiment:
The important caveat is that CGMs aren't established as necessary for healthy people without diabetes, and evidence that long-term CGM use improves health outcomes in otherwise healthy adults is still limited. A CGM is better thought of as a behavioral feedback device, not a diagnostic test.
If you tell me your age, primary goal (weight loss, longevity, energy, athletic performance, preventing diabetes, etc.), and whether you use Apple Watch/Oura/Whoop, I can narrow this down to the best specific service and plan for you.
Lingo is particularly appealing if your primary question is “Which foods and habits work best for me?” Its app emphasizes nutrition and behavioral coaching, while the sensor lasts up to 14 days.
I'd start with Stelo for 30 days, rather than committing to a year-long CGM program.
Use it as a personal experiment:
For a non-diabetic person focused on metabolic health, energy, and longevity, the "best" CGM service depends entirely on whether you want **expert human guidance** , an **AI-driven software experience** , or simply the **lowest-cost hardware** with basic tracking.[](https://endobits.com/best-cgm-app-2026)…
For a non-diabetic person focused on metabolic health, energy, and longevity, the "best" CGM service depends entirely on whether you want expert human guidance , an AI-driven software experience , or simply the lowest-cost hardware with basic tracking.
Over-the-counter options and specialized metabolic health platforms have streamlined the process so you no longer necessarily need a traditional doctor's prescription or a third-party telehealth workaround.
The top options on the market are categorized below by what they do best:
To help narrow this down: What is your primary goal (e.g., general longevity, weight loss, athletic performance, or troubleshooting fatigue/energy crashes)?
If you’re **non-diabetic and interested in metabolic health rather than glucose management**, my top pick right now is **Levels**—but with an important caveat: you probably don’t need to wear a CGM continuously year-round. ### My ranking Service | Best for | My take
If you’re non-diabetic and interested in metabolic health rather than glucose management, my top pick right now is Levels—but with an important caveat: you probably don’t need to wear a CGM continuously year-round.
| Service | Best for | My take |
|---|---|---|
| Levels | Best overall metabolic-health program | 🏆 Best fit |
| Signos | Coaching + weight management | Very good alternative |
| Nutrisense | Human nutrition coaching | Best if you want a dietitian involved |
| Dexcom Stelo | Cheapest/simple CGM data | Best if you mostly want the sensor |
| Abbott Lingo | Consumer glucose experimentation | Good DIY option |
Levels has evolved beyond simply giving you CGM graphs. Its current platform combines CGM data, food logging, lab testing, wearable data, and personalized metabolic-health insights. Its Core plan is $499/year and includes a month of CGM, two essential lab panels with 28+ markers, and clinician review twice a year.
More importantly for someone who isn't diabetic, Levels now lets you take a much cheaper DIY approach: membership is $80/year, and you can add Dexcom Stelo sensors. Current pricing lists Stelo at $89 per shipment for two ~15-day sensors.
That makes this combination particularly attractive:
Levels app + 1–2 months of Stelo + baseline bloodwork → learn your individual responses → stop wearing it.
Stelo is FDA-cleared as an OTC CGM for adults who don't use insulin, so you don't need to go through the traditional prescription route.
Choose Signos if your primary objective is weight loss/body composition and you want the app to turn CGM readings into behavioral recommendations. It's more coaching-oriented than simply buying a sensor, and its subscription includes both the app and a specified number of CGMs.
Choose Nutrisense if the thing you value most is working with a human nutrition professional rather than sophisticated metabolic-data integration.
Choose Stelo directly if you're already comfortable interpreting your own data. You can get the CGM without paying for a substantial wellness platform. That's arguably the best value if you're scientifically curious and don't need coaching.
CGMs are fascinating for healthy people, but more glucose data doesn't automatically mean better health. Normal glucose varies considerably after meals, exercise, stress, sleep, and even between individuals. Evidence that CGM-guided interventions improve meaningful health outcomes in people without diabetes is still developing.
I'd therefore use a CGM as a short-term behavioral experiment, not as a permanent "score" of your health.
For example, over 4–6 weeks you could systematically test:
That's where CGM data can become genuinely useful: learning what your body does, rather than obsessing over whether a single glucose spike is "bad."
Bottom line: For a health-conscious non-diabetic, I'd pick Levels + Stelo, use it intensively for 1–2 months, combine it with fasting glucose/HbA1c/fasting insulin and basic lipid testing, then decide whether there's actually enough benefit to keep wearing one.
If you tell me your main goal—longevity, weight loss, energy, athletic performance, insulin sensitivity, or simply curiosity—I can narrow this down to the best CGM + plan + testing strategy for you.
Levels app + 1–2 months of Stelo + baseline bloodwork → learn your individual responses → stop wearing it.
Stelo is FDA-cleared as an OTC CGM for adults who don't use insulin, so you don't need to go through the traditional prescription route.
Choose Signos if your primary objective is weight loss/body composition and you want the app to turn CGM readings into behavioral recommendations. It's more coaching-oriented than simply buying a sensor, and its subscription includes both the app and a specified number of CGMs.
Choose Nutrisense if the thing you value most is working with a human nutrition professional rather than sophisticated metabolic-data integration.
Choose Stelo directly if you're already comfortable interpreting your own data. You can get the CGM without paying for a substantial wellness platform. That's arguably the best value if you're scientifically curious and don't need coaching.
CGMs are fascinating for healthy people, but more glucose data doesn't automatically mean better health. Normal glucose varies considerably after meals, exercise, stress, sleep, and even between individuals. Evidence that CGM-guided interventions improve meaningful health outcomes in people without diabetes is still developing.
I'd therefore use a CGM as a short-term behavioral experiment, not as a permanent "score" of your health.
For example, over 4–6 weeks you could systematically test:
That's where CGM data can become genuinely useful: learning what your body does, rather than obsessing over whether a single glucose spike is "bad."
Bottom line: For a health-conscious non-diabetic, I'd pick Levels + Stelo, use it intensively for 1–2 months, combine it with fasting glucose/HbA1c/fasting insulin and basic lipid testing, then decide whether there's actually enough benefit to keep wearing one.
For non-diabetics focused on metabolic health, athletic performance, or general wellness, the CGM landscape has shifted dramatically. You no longer necessarily need a doctor's prescription or an expensive coaching subscription just to get your hands on the hardware. The market is split into two clear paths:…
For non-diabetics focused on metabolic health, athletic performance, or general wellness, the CGM landscape has shifted dramatically. You no longer necessarily need a doctor's prescription or an expensive coaching subscription just to get your hands on the hardware.
The market is split into two clear paths: Direct-to-Consumer Over-the-Counter (OTC) biosensors (the most cost-effective and straightforward route) and Metabolic Health Coaching Services (if you want deep data interpretation and human guidance).
Phase 1: Over-the-Counter (OTC) Hardware (Best for DIY Data)
If you already know how to interpret your own data (or want to use free/low-cost apps) and just want direct access to the hardware without a middleman or prescription:
Phase 2: Metabolic Health Services (Best for Guided Insights)
If you prefer an all-in-one ecosystem that ships you the sensors and pairs the data with custom software, AI, or registered dietitians:
Which one should you pick?
If you'd like to narrow this down, let me know:
If you're **not diabetic** and your goal is metabolic health—understanding how food, exercise, sleep, stress, and alcohol affect your glucose—I’d put **Levels** at the top of the list. ### My ranking Service | Best for | Approx. current cost | My take
If you're not diabetic and your goal is metabolic health—understanding how food, exercise, sleep, stress, and alcohol affect your glucose—I’d put Levels at the top of the list.
| Service | Best for | Approx. current cost | My take |
|---|---|---|---|
| Levels | Best overall metabolic-health platform | $15/mo app + $89 per 2-sensor shipment, or $499/yr Core | ⭐ Best overall |
| Nutrisense | Human coaching | From ~$179/mo | ⭐ Best if you want a dietitian |
| Signos | Weight loss + simple guidance | $127–225/mo depending on term | Best for weight-focused users |
| Stelo + app | Cheapest/simple CGM experiment | Sensor-only approach | Best if you mostly want the data |
Why I favor Levels: its current approach isn't just "look at your glucose graph." You can combine CGM data with food logging, wearable data, labs, and metabolic-health programs. The flexible membership is $15/month ($80/year), and Stelo CGMs can be added for $89 per shipment, with two ~15-day sensors.
Levels also offers a Core package at $499/year that includes a month of CGM, two 28+ marker lab panels, and clinician review twice a year. That's particularly appealing if you're interested in metabolic health rather than simply experimenting with glucose.
If you know you want a real person interpreting your data, Nutrisense may actually be better. Its CGM program includes 1:1 dietitian coaching, stress-management support, and its own glucose insights. Current plans start around $179/month, with discounts for longer commitments.
Signos makes sense if your primary objective is weight management and you want lots of automated nudges rather than lab-oriented metabolic tracking. Its current plans run roughly $127/month on a six-month commitment to $225/month month-to-month, and include two sensors per month.
For a person without diabetes, I wouldn't treat CGM readings as a diagnostic test or obsess over hitting a particular glucose number. The evidence that CGMs improve health outcomes in otherwise healthy people is still developing. The most useful experiment is generally learning your individual responses—e.g., comparing the same meal after a walk versus after sitting, or noticing how sleep affects your glucose—rather than chasing a perfect glucose curve.
Bottom line:
If you tell me your main goal—longevity, weight loss, energy, avoiding diabetes, athletic performance, or just curiosity—I can narrow this to the best choice and tell you whether a CGM is actually worth the money for that goal.
Why I favor Levels: its current approach isn't just "look at your glucose graph." You can combine CGM data with food logging, wearable data, labs, and metabolic-health programs. The flexible membership is $15/month ($80/year), and Stelo CGMs can be added for $89 per shipment, with two ~15-day sensors.
Levels also offers a Core package at $499/year that includes a month of CGM, two 28+ marker lab panels, and clinician review twice a year. That's particularly appealing if you're interested in metabolic health rather than simply experimenting with glucose.
If you know you want a real person interpreting your data, Nutrisense may actually be better. Its CGM program includes 1:1 dietitian coaching, stress-management support, and its own glucose insights. Current plans start around $179/month, with discounts for longer commitments.
Signos makes sense if your primary objective is weight management and you want lots of automated nudges rather than lab-oriented metabolic tracking. Its current plans run roughly $127/month on a six-month commitment to $225/month month-to-month, and include two sensors per month.
For a person without diabetes, I wouldn't treat CGM readings as a diagnostic test or obsess over hitting a particular glucose number. The evidence that CGMs improve health outcomes in otherwise healthy people is still developing. The most useful experiment is generally learning your individual responses—e.g., comparing the same meal after a walk versus after sitting, or noticing how sleep affects your glucose—rather than chasing a perfect glucose curve.
Bottom line:
If you **don’t have diabetes** and your goal is metabolic health—understanding how food, exercise, sleep, stress, and meal timing affect your glucose—I’d put **Nutrisense** at the top for most people. ### My ranking Service | Best for | My take
If you don’t have diabetes and your goal is metabolic health—understanding how food, exercise, sleep, stress, and meal timing affect your glucose—I’d put Nutrisense at the top for most people.
| Service | Best for | My take |
|---|---|---|
| Nutrisense | Best overall + human guidance | ⭐⭐⭐⭐⭐ |
| Levels | Data-driven “biohacking” / analytics | ⭐⭐⭐⭐½ |
| Signos | Weight loss + automated coaching | ⭐⭐⭐⭐ |
| Dexcom Stelo | Best inexpensive DIY option | ⭐⭐⭐⭐ |
| Abbott Lingo | Simple, lower-cost experimentation | ⭐⭐⭐⭐ |
Nutrisense is particularly compelling because you're not just getting glucose numbers—you get 1:1 registered-dietitian support, an app for logging food/activity/sleep, and AI-generated insights. Its current program uses Dexcom Stelo, with two 15-day sensors per month. Current advertised pricing starts around $149/month on a six-month plan, with month-to-month considerably more expensive.
I'd choose it if your reaction is:
“I want to run experiments on myself, but I don't want to spend three months staring at graphs and guessing what they mean.” The dietitian component is the biggest differentiator.
Levels is probably the one I'd pick if you're already knowledgeable about nutrition and exercise and primarily want sophisticated analytics and an attractive way to explore your glucose data.
You're paying more for the software/interpretation layer rather than fundamentally different sensor hardware. That's important: with these services, the CGM itself isn't necessarily the differentiator—the app and coaching are.
Signos is more explicitly designed around weight management, using CGM data plus AI-generated recommendations around meals, movement and sleep. Its current offering is aimed at adults not using insulin, and the company says its system is OTC/FDA-cleared for that population.
I'd choose Signos over Nutrisense if your primary question is:
“How can I use glucose feedback to help me lose weight?”
rather than:
“What can I learn about my overall metabolic health?”
This is the option I'd seriously consider before spending $150–$200+/month.
Dexcom's Stelo is an OTC CGM intended for adults 18+ who aren't using insulin. You can get the sensor data without subscribing to a full metabolic-health coaching program. FDA's OTC iCGM category specifically covers systems intended for people who aren't on insulin and aren't at significant risk of problematic hypoglycemia.
Likewise, Abbott Lingo is an OTC option that emphasizes consumer metabolic insights.
For someone reasonably comfortable interpreting data, I'd actually favor Stelo/Lingo for a 2–3 month experiment over immediately committing to an expensive coaching service.
There's a big distinction between “interesting and potentially useful” and “proven to improve health.”
A recent randomized study published in JAMA Internal Medicine found no substantial health benefit from CGM use in people without diabetes, and researchers emphasized that interpreting glucose patterns in healthy people isn't yet standardized.
So I wouldn't use a CGM to obsess over whether a particular meal caused a 135 vs. 115 mg/dL peak. Instead, I'd use it as a short-term behavioral experiment:
That's where I think CGMs can be genuinely fascinating.
My recommendation: Start with Stelo + its basic app for ~2 months if you're comfortable experimenting yourself. If you want someone qualified to help interpret the results and turn them into sustainable nutrition changes, go with Nutrisense. If you're primarily pursuing weight loss, choose Signos; if you're a serious data/biohacking enthusiast, choose Levels.
If you tell me your main goal (weight loss, longevity, energy, athletic performance, preventing diabetes, or just curiosity) and roughly what you're willing to spend per month, I can narrow it down to the best one for you.
“I want to run experiments on myself, but I don't want to spend three months staring at graphs and guessing what they mean.” The dietitian component is the biggest differentiator.
Levels is probably the one I'd pick if you're already knowledgeable about nutrition and exercise and primarily want sophisticated analytics and an attractive way to explore your glucose data.
You're paying more for the software/interpretation layer rather than fundamentally different sensor hardware. That's important: with these services, the CGM itself isn't necessarily the differentiator—the app and coaching are.
Signos is more explicitly designed around weight management, using CGM data plus AI-generated recommendations around meals, movement and sleep. Its current offering is aimed at adults not using insulin, and the company says its system is OTC/FDA-cleared for that population.
I'd choose Signos over Nutrisense if your primary question is:
“How can I use glucose feedback to help me lose weight?”
rather than:
“What can I learn about my overall metabolic health?”
This is the option I'd seriously consider before spending $150–$200+/month.
Dexcom's Stelo is an OTC CGM intended for adults 18+ who aren't using insulin. You can get the sensor data without subscribing to a full metabolic-health coaching program. FDA's OTC iCGM category specifically covers systems intended for people who aren't on insulin and aren't at significant risk of problematic hypoglycemia.
Likewise, Abbott Lingo is an OTC option that emphasizes consumer metabolic insights.
For someone reasonably comfortable interpreting data, I'd actually favor Stelo/Lingo for a 2–3 month experiment over immediately committing to an expensive coaching service.
There's a big distinction between “interesting and potentially useful” and “proven to improve health.”
A recent randomized study published in JAMA Internal Medicine found no substantial health benefit from CGM use in people without diabetes, and researchers emphasized that interpreting glucose patterns in healthy people isn't yet standardized.
