Ketone Breath Analyzer Portable Ketosis Breath Tester - Accurate Ketosis Breath Meter with 10 Replaceable Mouthpieces

When first purchased it approximately matched my blood tests. After about 11 months it was consistently reading 0 even when blood test showed up to 2.3.

I do Ketogenic diet along with Intermittent Fasting of 16/8 & 18/6.When I measure after wake-up (12 hrs after last meal) I got readings between 20 to 40 (KET ppm) depending on what I eat in my last meal. I noticed that when I eat in my last meal evening meal with goat cheese and MCT OIL I got higher Ket-ppm between 25-40. When I did not eat goat cheese products I got mainly 20. I also measure after the 16 hrs and 18 hrs fasting and I witnessed the same phenomena of readings. Once I noticed that after 18 hours of fasting I ate a small piece of cheese before my first meal, and measured my Keatons(after half an hour) I got a low reading of 7. Meaning when I “break” my fasting even with small piece of food it affects the measurements.I an satisfied with this measurement equipment. It is easy to use.Especially I recommend it, if you really follow a lifestyle of maintaining a Ketogenic and Intermittent Fasting.This review is my impression during 1.5 months of daily use with this devise.