Measure your metabolism in a single breath
Key to Health combines a breath sensor, a personal AI agent, and a Mediterranean-inspired dietary approach to deliver clinically validated weight management.
Your breath reveals how your body burns fat
When the body breaks down stored fat for energy, acetone appears in exhaled breath. Key to Health measures this biomarker in real time — creating a feedback loop between dietary choices and metabolic outcomes that builds lasting habits.
Breathe
Exhale into the Gen 2 sensor. In seconds, see your current metabolic state — whether your body is burning fat or sugar.
Learn from KEY
KEY, your personal AI agent, analyzes your measurements, behavioral patterns, and context to give you personalized metabolic insights 24/7.
Build lasting habits
Real-time feedback reinforces healthy choices. You develop intuition about what works for your body — knowledge that persists long-term.
Proven in a randomized controlled trial
We hold ourselves to the same evidence standards used to evaluate pharmaceuticals: randomized controlled trials with independent oversight, pre-registered analyses, and peer-reviewed publication.
Randomized controlled trial — University of British Columbia
155 adults randomized to Key to Health vs. WW (an evidence-based active comparator, not placebo). Independent biostatisticians, publicly funded by the Canadian Institutes of Health Research.
Weight loss sustained at 48 weeks without additional intervention. Published mediation analysis confirmed biofeedback engagement drove outcomes through behavior change. Results consistent at scale in a real-world study of 11,365 adults (under peer review).
Before, during, and after GLP-1 medications
GLP-1 receptor agonists have demonstrated that significant weight loss is biologically achievable. But medications alone don't build lasting dietary habits — and employers are navigating cost, discontinuation, and weight regain.
These medications change how much someone wants to eat — but they don't teach what to eat or why it matters. When the medication stops, the learned behavior stops too, because no new behavior was ever learned.
Key to Health addresses this gap with real-time metabolic biofeedback that builds lasting dietary skills — complementing pharmacotherapy at every stage.
A first-line weight management option for members who haven't started medication — or who want to try a behavioral approach first.
Build dietary skills while on GLP-1 therapy. Breath acetone biofeedback helps members understand how their food choices affect their metabolism.
Maintain results after discontinuation. The behavioral skills and metabolic understanding persist — reducing the risk of weight regain.
Designed for population health at scale
Key to Health delivers personalized weight management through an AI agent and breath sensor — no coaching staff, no scheduling, no linear cost increases as your population grows.
AI-powered personalization
KEY, the AI agent, provides 24/7 personalized metabolic guidance. Program capacity scales without headcount — every member gets individualized support.
Clinically validated
Published RCT with independent oversight. Real-world evidence at scale. Pre-registered analyses. The same evidence standards as pharmaceuticals.
Cost-effective
A fraction of the per-member cost of GLP-1 medications. Works as a standalone program or alongside pharmacotherapy to improve long-term outcomes.
General wellness
A general wellness program aligned with 2026 U.S. Dietary Guidelines. Mediterranean-inspired, flexible, low in ultra-processed foods. Supports healthy lifestyle choices through metabolic biofeedback.
Let's talk about your population
We're happy to walk through our clinical data, implementation model, and pricing with employers, health plans, and benefits consultants.
Get in touch