For decades, people interested in tracking their blood sugar levels in real time needed a prescription and often had to rely on finger pricks for data. That has changed with the arrival of over-the-counter continuous glucose monitors, or CGMs, now available to adults seeking insights into how food, sleep, stress and exercise influence metabolic health. Three prominent options on the market are Stelo, Lingo and Levels, each offering distinct features for users without diabetes who want to monitor glucose trends.
The Stelo Glucose Biosensor System from Dexcom stands out as an integrated continuous glucose monitor designed for individuals 18 years and older who are not on insulin. According to the product website, it continuously measures, records, analyzes and displays glucose values to help users identify normal and dysglycemic ranges. The device supports a wear time of up to 15 days, including a 12-hour grace period, and connects to a smartphone app that shows how specific lifestyle factors affect glucose responses.
Users of Stelo can track the impact of particular foods, exercise routines, stress levels, sleep patterns or fasting periods on their glucose levels without needing a prescription. This accessibility marks a shift from earlier CGM technology, which was primarily reserved for those managing diabetes through medical channels. The system streams data to provide ongoing feedback rather than isolated snapshots from traditional testing methods.
Lingo takes a different approach with an emphasis on rapid data updates. The biosensor streams real-time glucose information to a phone app every minute, compared to some other sensors that refresh every 15 minutes. It lasts up to 14 days, remains water resistant and requires no charging, making it a discreet option for continuous monitoring of responses to food, exercise and stress.
The Lingo app goes beyond raw data by pairing glucose readings with science-backed tips intended to support healthier habits over time. This focus on immediate feedback and habit-building distinguishes it from devices that deliver information at slower intervals. Like Stelo, it operates without a prescription and targets adults looking to understand metabolic patterns through lifestyle adjustments.
Levels offers a broader perspective by integrating CGM data with additional inputs such as lifestyle details and biomarker testing. The company states that it helps users see how diet and daily choices affect energy, appetite and long-term metabolic health. Individuals can supply their own CGM or obtain one through the service, which then surfaces patterns related to glucose spikes, variability and insulin sensitivity.
According to the source material, Levels aims to provide a more comprehensive view than glucose tracking alone. This method combines sensor readings with other health markers to identify trends that might not appear from CGM data in isolation. The approach appeals to those seeking personalized insights beyond basic monitoring.
Continuous glucose monitors in general work by using a small sensor placed under the skin to measure glucose in interstitial fluid around the clock. The information transmits to a phone app that displays current levels and trends, offering a dynamic alternative to fingerstick tests. Some models can also link with insulin pumps, though the OTC versions discussed here focus on non-insulin users.
The American Diabetes Association notes that CGMs can help avoid or delay serious short- and long-term diabetes complications while potentially reducing costs through improved management and fewer hypoglycemia emergencies. These devices also deliver real-time biofeedback that allows users to adjust dietary patterns or insulin doses based on observed trends, as directed by healthcare professionals.
However, none of the OTC sensors replace medical guidance, and marketing aimed at wellness audiences can sometimes obscure this distinction for non-diabetic users. Officials from the ADA advise taking time to review options and consulting a doctor or diabetes educator for guidance on the most suitable system. Such professionals can assist with the transition to a CGM and offer training on interpreting data for appropriate decisions.
The American Association of Clinical Endocrinology has compiled a detailed comparison of CGM devices to aid selection. This resource outlines practical differences that consumers should consider when evaluating Stelo, Lingo or Levels for personal use. Background on these monitors traces back to their origins in diabetes care, where they provided continuous data instead of periodic checks.
Choosing among the models depends on priorities such as update frequency, wear duration and additional features like habit tips or biomarker integration. Stelo emphasizes accessibility and a longer wear period, Lingo prioritizes minute-by-minute streaming, and Levels incorporates wider lifestyle and testing elements. Each operates within the same goal of helping users understand metabolic responses without prescriptions.
Reports indicate growing interest in these devices among people with prediabetes, obesity or other conditions that benefit from glucose awareness. The shift to over-the-counter availability expands access but also underscores the need for informed decisions based on individual health contexts. As more adults explore these tools, discussions with healthcare providers remain central to effective use.
Future developments may bring further refinements to OTC CGMs, building on current models from Dexcom and others. For now, the options provide practical ways to observe how daily behaviors influence glucose levels in real time, according to product descriptions and expert recommendations from organizations like the ADA.