ðĨ Managed at our clinic: Our board-certified endocrinologists evaluate and manage all current AID systems including the iLet. Book a pump consultation â
The Beta Bionics iLet â often called the "bionic pancreas" â is a fundamentally different kind of insulin pump. While most AID systems still require patients to count carbohydrates and enter meal data, the iLet is designed to work without carb counting. Its self-learning algorithm starts from your body weight and continuously adapts, making it one of the most autonomous diabetes technology systems available today.
What Makes the iLet Different?
Two things set the iLet apart from every other FDA-cleared insulin pump:
- No carb counting required. Instead of entering grams of carbohydrates, you simply announce whether your meal is "usual," "more than usual," or "less than usual." The algorithm handles the rest.
- Self-learning dosing from day one. Setup requires only your body weight. The iLet calculates starting doses from there, then adapts to your actual glucose responses over time â no manual programming of basal rates, insulin-to-carb ratios, or correction factors.
Announce "usual / more / less." Algorithm calculates the bolus. No grams, no math.
Adapts to your personal patterns continuously. No basal rates or I:C ratios to program.
Paired with Dexcom G6. Reads glucose every 5 minutes to drive automated dosing decisions.
Designed to eventually deliver both insulin and glucagon (bihormonal). Current version: insulin-only mode.
How the iLet Works: Day-by-Day
Setup: Your endocrinologist enters your body weight. The iLet calculates initial dosing from there â no basal rate programming, no I:C ratios.
Meals: When you eat, you press a button and select "usual meal," "more than usual," or "less than usual." No carb counting. The algorithm uses glucose trend data plus meal announcement to calculate an appropriate bolus.
Continuous adaptation: Every day, the iLet analyzes your glucose responses and refines its dosing. Within 2â3 weeks, most users see the algorithm closely personalized to their insulin needs.
Automated basal: Between meals, the iLet continuously adjusts insulin delivery using Dexcom G6 readings â increasing before predicted highs and suspending before predicted lows.
Who Is a Good Candidate?
- People with Type 1 diabetes who find carb counting stressful or inaccurate
- Those with irregular eating schedules or unpredictable meal composition
- Newly diagnosed patients or those starting pump therapy for the first time
- Children and adolescents (well-studied in pediatric clinical trials)
- People who want maximum automation with minimal manual decision-making
ðĄ Clinical Note: In the pivotal iLet trial (BBCL study), participants spent an average of 79% time-in-range after 13 weeks â a significant improvement from their baseline. Notably, these results were achieved without carb counting. Our endocrinologists find the iLet particularly valuable for patients who have struggled with consistent carb counting or complex pump programming.
Quick Comparison: Current AID Systems
| Pump | Type | CGM | Unique Feature |
|---|---|---|---|
| Omnipod 5 | Tubeless pod | Dexcom G6 | No tubing, smartphone control |
| Tandem t:slim X2 | Tubed | Dexcom G6/G7 | Remote software updates, touchscreen |
| Medtronic 780G | Tubed | Guardian 4 | Auto correction boluses every 5 min |
| Twiist | Tubeless pod | Dexcom G7 | Predictive adaptive dosing |
| Beta Bionics iLet | Tubed | Dexcom G6 | No carb counting required, self-learning |
Frequently Asked Questions
What is the Beta Bionics iLet?
The iLet is an insulin pump by Beta Bionics, sometimes called the 'bionic pancreas.' Unlike other pumps, the iLet's algorithm requires no carb counting â patients simply announce whether a meal is 'typical,' 'more than usual,' or 'less than usual.' The system uses Dexcom G6 readings and its self-learning algorithm to figure out the right dose. It's FDA-cleared for insulin-only therapy in people with Type 1 diabetes.
Does the iLet require carb counting?
No â this is the iLet's most distinctive feature. Instead of entering carbohydrate grams, you simply announce 'usual meal,' 'more than usual,' or 'less than usual.' The iLet algorithm calculates the dose automatically and continuously adapts to your patterns over time. This makes it particularly accessible for people who find carb counting burdensome.
What CGM does the Beta Bionics iLet use?
The iLet Bionic Pancreas currently integrates with the Dexcom G6 CGM. The Dexcom G6 sends glucose readings every 5 minutes to the iLet, driving its adaptive dosing algorithm.
What does 'bionic pancreas' mean?
The term 'bionic pancreas' refers to a device that attempts to replicate the full function of a healthy pancreas. Beta Bionics designed the iLet to eventually deliver both insulin (to lower glucose) and glucagon (to raise glucose), mimicking both alpha and beta cell function. The current FDA-cleared version operates in insulin-only mode; bihormonal research is ongoing.
Who is the iLet best suited for?
The iLet is particularly well-suited for people with Type 1 diabetes who struggle with carb counting, those new to pump therapy, and people with busy or unpredictable eating schedules. It's also well-studied in pediatric populations. Your endocrinologist can help determine if the iLet's simplified interface fits your needs.
How does the iLet learn my insulin needs?
The iLet starts with your body weight to calculate initial dosing, then uses a self-learning algorithm that continuously adjusts based on your actual glucose responses. It adapts to your patterns over days to weeks, personalizing basal and bolus delivery without requiring manual programming of rates and ratios.
Is the Beta Bionics iLet covered by insurance?
Coverage for the iLet is available through many commercial insurers and is expanding. Prior authorization is typically required. Our team will review your specific insurance plan and assist with the authorization process during your pump consultation.
Key Takeaways
- The iLet requires no carb counting â patients announce meal size (usual/more/less)
- Self-learning algorithm starts from body weight and adapts continuously to your patterns
- Works with Dexcom G6 CGM
- FDA-cleared for insulin-only AID in Type 1 diabetes
- Designed as a "bionic pancreas" with future potential for bihormonal (insulin + glucagon) delivery