but being able to measure small amounts of acetone in your breath would be the ideal way to measure ketosis. [Jens] came up with a device that does just that. It’s called Ketosense, and it will ...

Ketosis may cause bad breath. Ketones are broken down for use ... Some blood glucose meters like Nova Max Plus and Abbott Precision Xtra also have the ability to check for blood ketones.

A blood test is the most accurate way to measure ketones and is used in doctor's offices, but involves a needle prick. However, urine strips and breath meters are also accurate and less invasive.