Levels
Continuous glucose monitoring + AI insights - turning blood sugar into a daily metric.
The CGM-as-a-service that turned blood sugar from a diabetic metric into a longevity metric.
Levels deserves credit for inventing a category. Pre-Levels, continuous glucose monitors were prescribed for type-2 diabetics and almost nobody else used them. Post-Levels, half of longevity Twitter has worn one for at least a month.
The product is a software layer on top of off-the-shelf CGM hardware (Stelo or Dexcom). The value-add is the app: meal photo logging, glucose-response scoring, sleep + exercise correlation, and an AI coach that explains why your bagel spiked you to 180 mg/dL when your oatmeal didn't.
Who should actually wear one: people optimizing insulin sensitivity, anyone with prediabetes signals, athletes managing fueling, anyone curious about their personal food responses. Who shouldn't: people who'll obsess over normal variation. Glucose moves a lot in healthy people; the app contextualizes it but you have to be ready to learn what "normal" looks like.
Anyone wanting to understand their personal food/exercise/sleep response to glucose, or working on insulin sensitivity.
You're prone to obsessing over normal variation, or you already have well-managed metabolic health and don't need data.
Specifications
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Where this fits
Levels Levels Membership cross-shops across several editorial surfaces - the full brand catalog, the buyer-intent tags this item carries, the price band it qualifies for, and any execution playbook that uses it.
Levels Levels Membership - buyer FAQ
Levels vs Nutrisense vs Signos - which CGM platform?
All three layer software on top of off-the-shelf CGM hardware. Levels has the deepest founder-stack audience + cleanest meal-logging UX. Nutrisense bundles nutrition coaching (RD-led). Signos focuses on weight management + algorithmic recommendations. For curious longevity buyers, Levels is the standard recommendation. For buyers wanting active dietitian coaching, Nutrisense. For weight-loss specifically, Signos.
How long should I wear a CGM?
30-60 days is the consensus learning protocol. Wear it long enough to see your responses to foods you actually eat (different breakfast types, restaurants, alcohol, hard workouts, late meals). After 60 days most users have learned their major patterns and don't need continuous monitoring. Some wear permanently; most graduate to the after-tool layer (e.g. Ambrosia RIZZ for trend tracking).
Does Levels require a prescription?
No - Levels handles the prescribing physician on their side through a partnership with Stelo (Dexcom's OTC CGM). No US doctor visit required for non-diabetic use. Shipping is automatic with subscription. Some users prefer prescribed Dexcom G7 for accuracy in clinical contexts.