The New Breathalyzer for Keto Dieters

Keyto says it analyzes your breath to tell you how much fat you’re burning. But does it actually work?

Image: Keyto

At a glance, the palm-sized breathalyzer could easily be mistaken for a vaping pen. But Keyto, a handheld breath sensor with an accompanying mobile app that announced its retail launch earlier this month, isn’t designed for…