Levels CGM vs Gutsi

Levels watches your blood sugar. Gutsi watches your gut. Two different systems, joined by the same passive-tracking philosophy.

What does Levels actually track?

Levels uses a continuous glucose monitor (CGM) or glucose biosensor, a small sensor worn on the arm or stomach that measures interstitial glucose every few minutes and typically lasts 10 to 14 days per sensor [1][2]. It was adapted from technology originally developed for people managing diabetes, and Levels' app translates the raw glucose data into food and lifestyle insights for people without diabetes. The output is essentially a real-time record of blood sugar response to meals, sleep and exercise.

What does Gutsi actually track?

Gutsi is built around a different biological signal entirely: gut wellness. Rather than measuring blood glucose, Gutsi is designed to track bathroom health patterns passively, without requiring a worn sensor or manual food logging, and sits alongside the best gut health trackers built for ongoing observation. It shares the same passive-tracking philosophy as a CGM in that neither requires daily manual data entry, much like devices that track bowel movements more broadly, but the two are measuring unrelated biological processes.

Same philosophy, different biology

Glucose response and gut health are both part of overall metabolic and digestive wellness, but they are not the same system, and improvement or stability in one does not necessarily indicate anything about the other. Research on the gut microbiome has found associations between gut bacterial composition and blood sugar response to food, but this is described as an association in early research, not a proven causal mechanism [3].

Why passive tracking as a category is growing

The common thread between these two very different products is the move away from occasional testing toward continuous, low-effort monitoring, an approach that has already reshaped how many people track sleep. Tools like Gutsi are designed to bring that same continuous, passive approach to a part of health that has had few tracking options until now, the same shift covered in what is bathroom health intelligence.

Frequently asked questions

Is a CGM a medical device?
CGMs were originally developed primarily for diabetes management, although glucose biosensors are now also marketed for people without diabetes. People considering one for wellness purposes should check the product's guidance and, ideally, speak with a healthcare provider first.

Can gut tracking and glucose tracking be used together?
Yes. Because they track different biological systems, there is no conflict in using both, and doing so could give a broader picture of overall metabolic and digestive patterns than either alone.

Practical takeaway

Anyone comparing these two products should ask which biological system they actually want visibility into, since the two do not overlap. Using both is reasonable for a fuller picture, but neither should be treated as a diagnostic tool, and anyone with diabetes or a related condition should use a CGM under clinical guidance.

References

1. NHS. Continuous glucose monitoring and hybrid closed loop for diabetes. https://www.nhs.uk/conditions/type-1-diabetes/managing-blood-sugar-levels/blood-testing/
2. Levels. The 2026 Levels Guide to Continuous Glucose Monitoring. 2026.
3. Zeevi, D., et al. (2015). Personalized nutrition by prediction of glycemic responses. Cell, 163(5), 1079-1094.

This content is for informational purposes only and does not constitute medical advice. If you have concerns about your digestive health, please speak to a healthcare professional.