What weight-loss research does and does not establish
Small trials have tested CGM feedback with structured nutrition counseling in selected groups. They do not establish that flattening glucose spikes causes weight loss, that a sensor alone produces lasting weight loss or that one commercial service works best.
A glucose trace does not measure insulin or fat burning. Lowering a post-meal glucose peak does not itself prove greater weight loss.
There is no validated CGM target for weight loss established here. Healthy research reference values such as time in 70–140 mg/dL are observations, not personal treatment goals.
Features to compare
Nutrisense currently lists Dexcom Stelo among its products. Coaching plans provide access to registered dietitians. Check the selected plan for sensor quantity, coaching and service eligibility; the device’s FDA indication does not determine eligibility for the service. No comparative trial here establishes Nutrisense as a weight-loss winner. Read our review →
Dexcom Stelo offers glucose tracking and food logging with up to 15-day wear. Compare its intended use, features and current manufacturer price. Read our review →
Check current manufacturer specifications and prices for the exact model or service. Choose based on the features you need.
OTC CGM devices for weight loss compared
| Device | Price/month | Key feature | Cleared for / notes |
|---|---|---|---|
| Nutrisense | Check price | RD access on coaching plans | Dietitian coaching; no weight-loss superiority established |
| Levels Health | Check price | App with meal scoring | App membership; no weight-loss superiority established |
| Dexcom Stelo | Check price | 15-day wear | People not on insulin; FDA-cleared from age 2 (June 2026) |
| Abbott Lingo | Check price | Lingo Count score | Adults 18+ not on insulin; over the counter |
CGM and weight loss
Choose according to clinical suitability, current features and support needs. Registered dietitian access is a service feature, not proof that one subscription gives the best chance of weight loss.
If you're self-directed and data-savvy: Levels Health lists an app membership and Dexcom Stelo is an OTC option without a subscription.
If you're new to CGM and not sure where to start: Compare Stelo’s current purchase price with the selected Levels or Nutrisense plan, including sensor supply, app access and support. A service subscription does not establish a weight-loss benefit.