The Best Continuous Glucose Monitors Worth Buying (Biohacker’s 2026 Review)

A thin needle-like filament painlessly entered my tricep, and I secured it with an adhesive patch.

Vital health and wellbeing data flowed to my iPhone. Each data point revealed insights into how my daily health habits impact my blood glucose.

Within hours, I’d discovered patterns and started adjusting my lifestyle accordingly. This technology is called Continuous Glucose Monitoring (CGM), and it’s transformed personalized health.

Here’s the thing. In 2026, you can walk into Walgreens and buy a CGM sensor for $49. No prescription. No doctor visit. The OTC revolution has completely changed the landscape since I first wrote this guide.

But raw glucose data alone won’t change your health. The real question isn’t “can I get a CGM?” anymore. It’s “which platform turns that data into actionable insights?”

In this guide, I’ll break down the two tiers of CGM options. Standalone OTC sensors for budget-conscious self-trackers, and premium platforms that pair hardware with AI coaching, dietitian access, and metabolic scoring algorithms. Plus, I’ll cover everything you need to know to run a successful CGM experiment.

How to Get a CGM as a Healthy Non-Diabetic

As of 2026, several CGMs are available over the counter in the US. The FDA cleared the Dexcom Stelo and Abbott Lingo for adults without diabetes starting in 2024. You can buy them at pharmacies, Amazon, or directly from the manufacturer.

For the premium platforms with coaching and AI features, here’s how the process typically works:

1. Pick a company below
2. Sign up and pay
3. A doctor from their medical team prescribes you a CGM (regardless of your health)
4. They’ll ship you one of the CGMs below
5. Download their app, and use it to track your lifestyle
6. When the CGM expires, you can re-order or just save your own data

Basically, all of the companies below actually prescribe you one of several models of continuous glucose monitors. Aside from the type of monitor, they differ on several other factors:

• The app (which makes a huge difference)
• Additional perks
• Nutritionist, doctor, or dietitian support
• Price

Several types of monitors exist.

Different Continuous Glucose Monitor Systems

Each device below has its own accompanying app. If you’re a data geek, looking for a challenge, and live in a country where CGMs don’t require a prescription, you can buy any of the below for much cheaper. Then you’ll have to do all the overlays yourself.

The other selling point of the all-in-one services is the well-polished apps and user experience that make your data useful.

The U.S. Food and Drug Administration (FDA) has cleared several over-the-counter CGMs for healthy non-diabetics [R].

Freestyle Libre

The Freestyle Libre is the most common and inexpensive of all CGM devices. Most of the services below use the Freestyle Libre (version 1, not 2). It uses NFC technology to sync glucose data to your phone. This transmitter lasts 14-days.

Unfortunately, this comes at the cost of data accuracy and granularity. You receive fresh glucose readings every fifteen minutes. The newer FreeStyle Libre 3 solves many of these issues and is great for athletes too. But it’s not as common and a bit more expensive than previous versions.

Abbott Libre Sense Glucose Sport

Abbott’s Libre Sense strikes the ideal balance between affordability and power. It’s a high-tech alternative to the Freestyle Libre. With greater accuracy, can be worn while swimming, and syncs data via BlueTooth rather than NFC.

Like the original, these transmitters last 14-days. TheLibre Sense Glucose Sport generates live minute-by-minute glucose data. Previously used by SuperSapiens (which shut down in 2024), this sensor technology has been succeeded by newer models.

Dexcom Stelo Glucose Biosensor

Dexcom’s first OTC glucose biosensor, cleared by the FDA in 2026 for adults without diabetes. It integrates with the Oura ring, has a 15-day wear time, and is waterproof up to 8 feet. Stelo can hold up to 12 hours of data.

Since it’s technically classified as a “Biosensor” rather than a CGM, it’s available without a prescription. It’s also become popular among GLP-1 (Ozempic) users to titrate their medication dosage. Several premium platforms including Nutrisense now use Stelo as their hardware.

Dexcom G6

The previous gold standard of CGMs. Dexcom is highly accurate, generates high-resolution readings, and has a large memory to store glucose data. Like The Libre Sense Glucose Sport, the G6 transmits data via BlueTooth. And transmitters last for a whopping 90-days.

Previously, it was a decision between the Freestyle Libre and Dexcom. Dexcom’s G6 won hands-down. Unfortunately, it’s prohibitively expensive (I was quoted $1,200 for 90-days).

Dexcom G7

Dexcom’s latest prescription CGM. Compared to the G6, it’s 60 percent smaller, lasts 10-14 days, uses an easier one-step auto applicator, is waterproof, and doesn’t require manual calibration. In late 2025, Dexcom launched a 15-day version of the G7.

Signos uses the G7, and it’s becoming the preferred sensor for premium CGM platforms due to its accuracy and convenience. Still requires a prescription for direct purchase.

Guardian 3

Made by a company called Medtronic, the Guardian 3 is another contender for the best CGM device. Their sensors, however, only last 7 days. It too transmits data via BlueTooth. The Guardian 3 requires twice daily manual calibration making it unsuitable for health optimization purposes.

The Best CGM Systems for Biohackers in 2026

I’ve personally tested most of these platforms. The CGM market has split into two clear tiers: affordable OTC sensors for self-trackers, and premium platforms that add coaching, AI insights, and metabolic scoring on top of the hardware.

Tier 1: Standalone OTC Sensors (Budget-Friendly)

These give you raw glucose data at the lowest cost. You’re on your own interpreting it. No coaching, no AI, no metabolic scores. Perfect for data-savvy biohackers who just want the numbers.

Best OTC Sensor: Dexcom Stelo

The Dexcom Stelo was the first OTC continuous glucose biosensor cleared by the FDA. It’s the same company behind the gold-standard G6 and G7 used by diabetics, but Stelo is designed specifically for non-diabetics who want glucose insights without a prescription.

Each sensor lasts 15 days (longer than most competitors) and connects via Bluetooth to a clean, intuitive app. It integrates with the Oura Ring, making it a natural fit if you’re already tracking sleep and recovery. Stelo is waterproof up to 8 feet and holds 12 hours of data.

At $89/month for a subscription or $55 for a single sensor, it hits the sweet spot between affordability and sensor quality. The tradeoff: you get raw data only. No coaching, no metabolic scores, no AI-powered meal recommendations.

Why not just buy a $49 Lingo instead? The Stelo sensor lasts a full day longer (15 vs 14), and Dexcom’s accuracy has been the clinical reference standard for years. If you’re serious about data quality, the extra few dollars are worth it.

Get Dexcom Stelo

Cheapest Entry Point: Abbott Lingo

Abbott is the company behind the FreeStyle Libre series, the most widely used CGM hardware on the planet. Lingo is their consumer-facing OTC product, designed for people who want glucose tracking without a prescription or a premium subscription.

At $49 per sensor (14-day wear), it’s the cheapest way to try CGM tracking. You can pick one up at Walgreens, Amazon, or Walmart. The app provides basic glucose tracking and food logging, but that’s about it.

Like Stelo, you’re getting raw data without coaching or AI interpretation. The sensor itself uses the proven Libre technology that powers most of the premium platforms too. If you just want to see how your body responds to different foods and don’t need hand-holding, Lingo is the no-brainer starting point.

Lingo is the gateway drug to CGM tracking. Most people who start here end up wanting more context, which is where the Tier 2 platforms come in.

Get Abbott Lingo

Tier 2: CGM + AI/Coaching Platforms (Worth the Premium)

These platforms pair CGM hardware with proprietary software, AI insights, dietitian coaching, or metabolic scoring algorithms. They cost more, but each one should clearly answer: “Why not just buy a $49 Lingo sensor instead?”

Best Overall: Ultrahuman M1

India-based Ultrahuman is one of the most exciting consumer healthtech brands around. They disrupted the smart ring industry by launching a powerful Oura alternative.

Next, they created an affordable service that gets you a full 100+ biomarker blood lab test from the comfort of your own home. Now, they’ve launched a leading new continuous glucose monitor called the M1.

Since the team has extensive previous experience building startups, the app UI is intuitive, modern, and easy to navigate. Your dashboard contains several very helpful metrics to monitor. Plus, a number of other biometrics that none of the other companies share.

Their proprietary Metabolic Score is a clinically-validated marker of insulin sensitivity and glucose metabolism [R].

Best of all, the M1 integrates with your other health data. If you run blood labs or own the Ultrahuman AIR smart ring, the same app overlays your scores to give you the most accurate possible snapshot of your overall health. Better than any other company I’ve found.

Ultrahuman’s M1 is powered by the new FreeStyle Libre 3. Unlike previous versions, this one uses Bluetooth Low Energy (BLE) technology to live stream your glucose readings.

Finally, to ensure you have the best possible experience, Ultrahuman offers free coaching with an in-app coach. Ask any questions or get help, 24/7.

Between complimentary coaching, state-of-the-art sensors, integration with other health data, an excellent user interface, and all at a reasonable price, Ultrahuman’s M1 is my go-to pick for most people.

Get Exclusive M1 Deal

Use Ultrahuman discount code URBAN10 for 10% off

Excellent Experience: Nutrisense

Nutrisense is largely considered the leader in bringing CGM technology to health optimizers. They have three important advantages over the others:

• A feature-rich app
• Affordable pricing ($39-$179/month tiers)
• Insurance-eligible dietitian coaching

I signed up because they seemed like the best deal. The app is well-polished, constantly updated, and nicely thought out. In fact, Nutrisense also has the best app of all the CGMs. They’re a Chicago-based startup growing quickly with a board of well-respected and credentialed advisors.

The reports I got back, paired with the dietitian (thanks Carlee) providing me advice made for an enjoyable, useful, and personal experience.

Pro Tip: the CGM app can make or break your trial. Nutrisense is one of the few that integrates directly with the hardware. With many of the others, you must download another app.

Now that they use the Stelo Glucose Biosensor, this is one of the top continuous glucose monitors. Read my full Nutrisense review here, or get your own below.

Get Exclusive Nutrisense Deal

Use NutriSense CGM discount code URBAN to save $25 off

Most Popular: Levels Health

Levels Health has evolved from a waitlisted beta into a fully available metabolic health platform. They’ve shifted to a tiered annual model ($125-$288+/year), and now support the Dexcom Stelo OTC sensor. No prescription needed.

Their standout feature is the proprietary metabolic scoring algorithm. Every meal, workout, and habit gets a score based on your glucose response. Over time, you build a personal database of what works and what doesn’t. Their food logging and activity tagging are among the best in the category.

Levels also publishes some of the best metabolic health content on the internet. Their blog and newsletter alone are worth following, whether or not you subscribe.

Why not just buy a $49 Lingo instead? Levels’ scoring algorithm is the differentiator. Raw glucose data shows you what happened. Levels tells you what it means and tracks your metabolic improvement over time.

Get Levels Health

Predictive Digital Twin: January AI

January AI took a different approach to CGM tracking. Named one of TIME’s Best Inventions of 2025, their platform builds a “digital twin” of your metabolism. It combines data from your food logs, heart rate, CGM, and other inputs to create a predictive model of your body.

Once trained, their AI can predict how different foods and activities will impact your blood glucose up to 33 hours in the future. That means you don’t need to wear the CGM forever. After the initial training period, the digital twin can generate predictions without the sensor.

The first month costs $288 and includes two CGM sensors, a digital telehealth assessment, and full app access. After that, the annual plan drops to $380/year for ongoing predictions and recommendations.

Why not just buy a $49 Lingo instead? January AI’s digital twin means you eventually stop needing the hardware. No other platform offers predictive glucose modeling that works without a sensor attached. If you want intermittent CGM use rather than permanent wear, this is the most cost-effective long-term option.

Get January AI

FDA-Cleared for Weight Loss: Signos

Signos made history in 2025 as the first CGM platform to receive FDA clearance specifically for weight management. That’s a massive differentiator. While every other platform positions CGM as a general wellness tool, Signos can legally market their product as a weight loss solution.

They use the Dexcom G7, which means no scanning, no finger pricks, and real-time Bluetooth streaming. The app focuses on AI-powered meal timing, giving you alerts when your glucose is in the optimal zone for fat burning vs. storage.

You also get integrations with Apple Watch, wearable device data overlays, and access to a concierge nutritionist. Plans range from $129-$199/month, with significant discounts on multi-month commitments.

Why not just buy a $49 Lingo instead? Signos is the only platform with an FDA-cleared weight management indication. Their AI tells you when to eat and what to eat based on your real-time glucose patterns. If weight loss is your primary goal, this specificity justifies the premium.

Get Signos

Prescription-Only Continuous Glucose Monitoring Systems

I came across these companies, but unless you have a doctor’s prescription, you won’t be able to use them.

Eversense

Eversense makes the only FDA-approved long-term continuous glucose monitor (90-days). Unfortunately, it’s only available to those with diabetes. Their CGM sensor can be submerged in one meter of water for up to 30 minutes. The device itself is advanced, features an Apple Watch app, and is actually removable. Eversense can also vibrate to inform you of hyper or hypoglycemia.

SugarBeat

SugarBeat came up in my initial research but seems to have quietly disappeared. The original link I had to was taken down and few traces exist on the Nemaura Medical website.

SteadyMD

SteadyMD is another service only available to diabetics. You’re able to sign-up for the waiting list, but of date, they have no official timeline of when their service will become available to the general public (without prescription).

Using a CGM as a Non-Diabetic

Before you decide which service to test out, come up with a list of your requirements and goals for the experiment.

When to Use Your CGM

Continuous glucose monitors are not like other popular wearables that continue feeding you data every day. Depending on the type, the sensor expires after a certain amount of time. They’re not cheap, so I suggest that you decide how to best use your time.

The first question is: how long will you need?

The standard options are two weeks and four weeks. In my experience:

• 2 weeks — for the metabolically flexible (can easily fast) that just want additional data and to spot some basic patterns. Requires more diligence and planning before starting to make the most of your CGM.
• 4 weeks — for those looking for a metabolic reset, to establish healthy habits, and to take a deeper look into the relation between diet, lifestyle, and health outcomes. Better for thorough testing and to make an appreciable impact on overall health.
• Beyond 4 weeks — for folks interested that enjoy added accountability, performance gains, and long-term support to their health goals. Or those that have lifestyles that fluctuate significantly.

After choosing your company and timeline, you’ll get your CGM in the mail. Before applying it, here are a few timing factors to consider:

• Are you stressed? When under abnormally heavy stress (work, traveling, relationships, etc), your blood glucose response will behave erratically.
• Is this period a good representation of your usual routine? To get the most out of your CGM, plan on activating it while in your usual routine.
• Can anything come up that will cut your experiment short? These devices are not reusable. Plan your experiment when nothing may force you to remove it.

Though brands are simplifying the process, actually using a CGM isn’t yet plug-and-play.

How to Use a CGM (Tips & Notes)

You applied it, and the first glucose readings came in. My first time, I thought:

… now what?

Here are a few notes that helped me get started.

Every device has a different calibration period. For the common FreeStyle Libre sensor, data can come in artificially high or low for the first 24-hours. Don’t panic, this is normal.

CGMs only hold so much data in memory. For the ones using NFC technology, you’ll have to tap it against your phone at regular intervals (generally every eight hours) to sync data. Should you forget, new data will overwrite some of the old, and you’ll see gaps in the app. I suggest syncing first thing in the morning, and just before bed.

Actively use the app. Where these services shine is helping you identify and quantify trends. Currently, this takes some manual effort. Logging snacks, timestamping routines (like cold showers), etc. New features constantly automate the process and make it more seamless. But plan to spend at least 10-15 minutes per day using the app to make your data useful and actionable.

CGMs measure interstitial fluid. You’ll likely see a 10-20 minute lag time (but up to 40 minutes max) behind typical finger-prick blood glucose readings. Glucose moves from your blood vessels and capillaries first and then into your interstitial fluid (IF), so there’s a delay in interstitial fluid values (especially after eating).

Once you’ve gotten a handle for how it works, you’ll want to know which of the numbers to pay closer attention to.

What Times to Check Glucose

If you do nothing else, there are three specific times throughout the day that you want to pay special attention to your blood sugar changes.

First, is after fasting (at least eight hours without food). Generally, you’ll get this number first thing in the morning. An ideal score is between 70-90 mg/dL, but many other factors can skew it. Fasting glucose, however, is one of the most important blood tests to determine overall health status. The largest influences include sleep, stress, and your final last meal of the previous day. Focus primarily on how fasting glucose trends.

Yet the most important measurements come after eating (“post-prandial glucose”). Logging exactly what you ate makes spotting trends much easier.

Lastly, blood sugar fluctuations during sleep can highlight metabolic or hormonal issues. If you wake up around 2-4 AM (like I did), you might notice correlations between glucose and sleep disturbances. Then you can try tweaking your dinner or pre-bed snack.

Now, you can begin designing CGM experiments (more painless than it sounds).

How to Design a CGM Experiment

Before testing the blood sugar impacts of fancy modalities and therapies, start by establishing your baseline. Notice any patterns throughout your first day or so.

According to Nutrisense, the big four factors that influence glucose include: stress, sleep, food, and meal timing. Follow the scientific method by controlling these and as many of the basic variables as possible:

• Timing: when you eat certain foods, exercise, sleep, or where you are in your menstrual cycle
• Quantity: shoot for the same proportions
• Sleep: sleep dramatically impacts blood sugar. Be as consistent as possible
• Meal composition: types of foods, and percentages of each macro (fat, protein, carbs)
• Supplementation & medication: certain compounds can drastically alter blood sugar
• Exercise: particular exercise styles can either increase or decrease levels
• Stress management: I found stress levels to be the biggest factor in my experiments

Try to make the trials as similar as possible so that the intervention becomes the primary explanation for differences in blood glucose.

Some services actually rate and score your days. Others don’t. Regardless, here’s a quick primer on healthy glucose scores.

Understanding Glucose Readings

Decoding your blood sugar trends is an art and science. Thanks to Carlee at Nutrisense for some of these insights!

To start, one of the primary goals of using a CGM is to increase your sensitivity to insulin. Your “Area Under the Curve” (AUC) is a proxy for how much insulin your body must produce to bring blood sugar back to homeostasis. The lower the better.

There are several factors to a stellar AUC, and I will address each:

1. Peak height
2. Glucose swings
3. Time to baseline

First and most obvious, you can easily spot and note how high your blood glucose spikes. Arterial damage and issues arise when peaks exceed >140 mg/dL. Minimize the height of glucose peaks.

Related to peak height, we want to maintain steady glucose control. Massive glucose fluctuations. Glucose should naturally increase (slightly) post-meal, and quickly come down. Huge spikes and drastic drops can indicate metabolic problems. Reputable services track this via what’s called your “delta value” or glycemic variability. Aim for a delta value of <50 max. For the glycemic variability score, <20 is good, and <14 is ideal.

When highly insulin sensitive, glucose should rapidly lower after spiking. Ideally within 2-3 hours post-meal.

When tracking and testing adjustments, watch how interventions impact the above three (and thus your metabolic health).

Lifestyle Factors & Biohacks to Test With Your CGM

The sky’s the limit in terms of what experiments you can run. You can test virtually any component to see if it impacts blood glucose. Of course, blood sugar stability is just one of many pillars of optimal health.

I’ve tested a bunch, and these are a few of my favorite CGM experiments & ideas.

Glucose disposal agent (GDA) supplements:

• Blood Sugar Breakthrough
• Berberine & dihydroberberine
• Liposomal supplements vs. traditional
• Metformin
• Rock lotus
• Bitter melon
• Chromium
• Glycine

Healthy lifestyle practices:

• Sauna
• Cold shower
• Coffee
• Extended fasting protocols
• Cardio vs strength training vs HIIT vs Yoga
• Walking
• Meditation

Others:

• Combining macros (starches + fats)
• Synergies from combining lifestyle practices and supplements
• For the ladies, the impact of different phases of your cycle
• Travel

How to Choose the Best CGM for Your Goals

Continuous glucose monitoring has gone from a diabetes-only medical device to one of the top biohacking products you can buy at your local pharmacy.

The OTC revolution means access is no longer the barrier. The real decision is how much support you want interpreting the data.

Here’s the quick decision framework based on your goals:

• Tightest budget: Abbott Lingo ($49/sensor, available at Walgreens)
• Best OTC sensor quality: Dexcom Stelo ($89/month, 15-day wear, Oura integration)
• Best coaching + dietitian access: Nutrisense ($179/month, insurance-eligible)
• Best metabolic scoring: Levels Health ($125-$288/year)
• Best for weight loss: Signos (only FDA-cleared CGM for weight management)
• Best wearable ecosystem: Ultrahuman M1 (Ring PRO + blood labs + glucose in one app)
• Best for intermittent use: January AI (digital twin learns your metabolism, no permanent wear needed)

Once you choose a platform, your personal experiment begins. Dedicate at least two weeks to building your baseline, then use the guide above to design targeted experiments around your diet, sleep, exercise, and stress.

The best CGM is the one you’ll actually use consistently. Start with a Tier 1 OTC sensor if you’re curious, then upgrade to a Tier 2 platform once you realize raw data alone isn’t enough to change behavior.