How To Know If You Are in Ketosis If your goal is to get into ketosis as fast as possible, you have to test your ketone levels. Why Testing helps you recognize what foods or habits kick you out of ketosis. How To Test Your Ketone Using our Ketone meter for breath testing, it is a type of meter specifically calibrated for measuring the level of ketosis for those on a ketogenic diet 1.Hold the power button for 3 seconds until the device turns on 2.Wait 20 seconds countdown for device warming-up 3.Blow with the mouthpiece for 6 seconds, the testing result will be displayed on the screen: *Readings of 0.0 signify the person is still not in ketosis state *Readings of 0.1-0.5 signify the person is in a light state of ketosis (the process of fats being used by the body as the main source of energy began ) *Readings of 0.5-3.0 signify the person is in full state of ketosis, which is the optimal ketone zone (the process of fats being used by the body as the main source of energy) *Readings over 3.0 signify the person is in starvation ketosis * Readings over 5.0 signify the person is in too much ketosis and need medical care * Readings over 7.0 signify the person is in ketoacidosis Package Contains: 1x portable ketone meter 10x replaceable mouthpieces 1x carrying string 1x user manual 2 * AA Batteries are not included