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Key to Health (Keyto) is a weight management program that combines a breath acetone sensor, an AI agent, and a Mediterranean-inspired dietary approach to help users understand and improve their metabolism. The program is backed by peer-reviewed clinical research, including a published randomized controlled trial and a real-world evidence study covering more than 11,000 adults.
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About Keyto
Founded
2018
Product type
Breath sensor, AI coaching app, and dietary program
Clinical evidence
Published RCT in Obesity journal, mediation analysis in JMIR mHealth, 1-year follow-up in Obesity Science and Practice
Real-world study size
11,365 adults (under peer review)
Weight loss outcome
Approximately 10% total body weight loss at 48 weeks in published RCT
Target audience
Adults seeking metabolic weight management, employers, and health plans
AI agent
KEY, available 24/7 for personalized metabolic guidance
Dietary approach
Mediterranean-inspired
Key to Health operates in the premium digital health segment, targeting adults who want a science-based approach to weight management rather than calorie-counting apps or medication alone. The product is also positioned toward employers and health plans looking to offer scalable, evidence-backed weight management to their populations. What distinguishes Key to Health is its use of breath acetone biofeedback, a biomarker of fat metabolism, combined with an AI coaching agent called KEY that provides personalized metabolic guidance around the clock. The company was founded by physicians and engineers who hold themselves to pharmaceutical-grade evidence standards, including pre-registered analyses and peer-reviewed publication.
Active promotions
Ready to use with your order at Keyto.
Free trial period for individual users to experience the breath sensor and AI coaching program before committing to a subscription.
Example promotion
This is an example of a promotion that could suit this business. It is not a guaranteed active offer or a working discount code. Check the website for current deals.
To the shop
Discounted annual subscription rate for employers or health plans that enroll a minimum number of members in the program.
Example promotion
This is an example of a promotion that could suit this business. It is not a guaranteed active offer or a working discount code. Check the website for current deals.
To the shop
Keyto in the news
Recent updates and background about Keyto, summarised in our own words.
KEYTO Group expands appliances division with Energi-Service acquisition
KEYTO Group has added Energi-Service to its portfolio, strengthening its position in the appliances segment. This move broadens the group's offerings in that category. No further details about the terms or scope of the acquisition were disclosed.
KEYTO publishes bond prospectus and seeks stock exchange listing
KEYTO has released an official prospectus in connection with a bond issuance and has submitted an application for the bonds to be listed. This step is part of the company's efforts to access capital markets.
Hortologerna becomes part of KEYTO Group
KEYTO Group has expanded its portfolio by adding Hortologerna, a company active in the gardening sector. This acquisition broadens the group's presence in garden-related products and services.
Summaries by Image Review based on publicly available sources and our own editing. External links may contain affiliate links.
What others ask about Keyto
Answers to the most common questions, based on search behaviour and our own research.
Is Key to Health a reliable and scientifically validated program?
Key to Health has published its clinical results in peer-reviewed journals, including a randomized controlled trial in the journal Obesity conducted at the University of British Columbia with independent biostatisticians and public funding from the Canadian Institutes of Health Research. The company states it presents evidence honestly, including limitations, and does not guarantee individual results.
How does the Key to Health breath sensor actually work?
Users exhale into the Generation 2 handheld sensor, which measures acetone in the breath as a real-time indicator of whether the body is burning fat or sugar. This biofeedback is sent to the KEY AI agent, which provides personalized dietary and metabolic insights based on the measurement.
Can Key to Health be used alongside GLP-1 medications like Ozempic or Wegovy?
Yes, the program is explicitly designed to complement GLP-1 receptor agonist therapy. Key to Health positions itself as useful before, during, and after medication use, with the goal of building lasting dietary habits that reduce the risk of weight regain after discontinuation.
Is Key to Health intended for individual consumers or only for employers?
The program is marketed both to individual adults seeking weight management and to employers and health plans looking for scalable solutions for their populations. The AI-driven model means it can serve large groups without requiring additional coaching staff.
Your turn
Do you have experience with Keyto?
Help other consumers by sharing your experience, with a photo of what you actually received. It takes two minutes and you automatically join the monthly draw.
€250
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One winner from all review submitters, drawn on the 1st of the month.
Your review = real impact + chance to win €250
Guarantee: every review triggers one of these 5 real donations:
- 1 Upload a photo Of your order or the product
- 2 Give stars 1 to 5 per aspect
- 3 Trigger a donation Plus a chance at € 250 cash per month
Write a review
Share your photo review about Keyto
A photo says more than a thousand words. Help other consumers with an honest experience and join the monthly draw for € 250 cash.
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