We are currently updating the trouble shooting guide with our new models. The guide will soon be updated with up to date tips.
Here are a some general tips:

Connection issues KETONIX® Bluetooth®

It is a Bluetooth® Smart device, you don't need to pair it before using the app.
Currently the software support is for smartphones/tablets using iOS, Android and Mac's. Windows version is on the way

Here are videos of how to connect and use with a smartphone:

iPhone: https://youtu.be/19VW9IJAWqI
Android: https://youtu.be/UazqCO6Apjc

Connection issues USB (KETONIX® Red/Blue and KETONIX® USB)

  • Make sure you only run one instance of the KETONIX® software.
  • Check if the cable is broken: connect a USB memory to the cable, then massage the cable and see if your USB gets disconnected.
  • Try another USB port
  • Try another computer 

No reading when measuring

  • Make sure you only run one instance of the KETONIX® software.
  • Make sure the software says the device is connected.
  • Check the sensor by using a drop or nail-polish remover (acetone) or a drop of wine on a cloth, hold the cloth to the mouthpiece ... you should get a reading.
  • Make sure your technique is ok: breathe as normal through your nose, then before inhaling - exhale as long as you possible can into the mouthpiece.
    Never take a deep breath before exhaling into the KETONIX® device, then you will measure the air around you.

Low readings even when fasting

  • Make sure your technique is ok: breathe as normal through your nose, then before inhaling - exhale as long as you possible can into the mouthpiece.
  • It can take some days to see an increase in breath ketones depending on how large your glycogen stores are and your liver status, it is personal.
    A measure after a 24 hrs water fast will for most people be a baseline for their breath acetone in nutritional ketosis.

Low readings in the morning after a night fasting

  • It is normal to have the days lowest readings in the morning, your circadian rythm produce cortisol and a rise in glucose to wake you up. 
  • To increase your ketone values in the morning, exercising in the evening and avoiding alcohol is a good tip.

Low readings after exercising

  • Depending on the type of exercise, intensity and length the body can respond differently. Some exercises generates cortisol and glucose increase, some only taps into fat-burning. The effect of training is interesting to monitor, so measure before and then many times  with  30 minutes interval after the training to see how it affects you.

    Some exercise will cause glucose increase right after exercise and you will see a initial low reading and a higher post-exercise value. Other exercises will have no change initially and higher values post-exercise ... etc etc. How your body reacts depends on how your metabolism works, it varies from person to person.

Lower readings after being fat-adapted

  • To have lower breath acetone readings after being in ketosis for a "long time" is logical. Your body has adapted to use fat as fuel and the consumers of ketones will mainly be your brain and heart. To increase breath ketones (breaking down fat) you need to use tricks as intermittent fasting and exercise.

    Do not expect to increase your breath ketones to skyhigh levels just because you have been on a ketogenic diet for a long time. The better your cells adapted to use fat direct, the less need for making them in the liver. The intra-muscular fat storage will also improve over time. 

    Using a KETONIX® device and measuring a lot can educate you in how your body works and what triggers your body to use fat as fuel. As your body adapts to your lifestyle, you might need to monitor this and be creative with your lifestyle. What worked 6 months ago might not work now ...

Breath ketones not correlating with blood measures

  • Not always, in some special contexts it does. Breath ketones is acetone, blood ketones is beta-hydroxybutyrate. Two different substances in two different medium. Two different uses in the body: acetone is waste product from metabolising free fatty acids into acetoacetate, beta-hydroxybutyrate is formed from excess acetoacetate and buffered in blood. Breath acetone does not come from beta-hydroxybutyrate. 

    There is no way of calculating blood mmol/l from breath PPM. It is two different substances, one is continously leaving the body and the other is buffered or used as energy.

  • KETONIX® indicates the breath acetone, not blood beta-hydroxybutyrate. Breath acetone comes from AcetoAcetate which is formed when breaking down fatty acids for energy. Blood beta-hydroxybotyrate concentration is the current buffer of not used AcetoAcetate. 

    If you need to know how much your stores of unused beta-hydroxybutyrate you have then you should use a blood ketone meter.

    If you want to know your current break down of fatty acids for energy, breath ketones are a good indicator. If your breath acetone is low it means your body gets energy from glucose. Exogenous ketones is energy for your body and in most cases lower your bodys need to use fat as fuel with a result of low breath ketones.


and finally ... your body is unique. How it works is likely to be different from others. Starting out a ketogenic lifestyle involves several phases in which the body adopts to. Some phases takes weeks/months before changes are noticeable, some are faster. This is highly dependent on your body status.

I understand that these advices is not by a licensed healthcare provider and will not have examined me or discussed my health condition with me. 
I also understand that KETONIX AB is not giving medical advice. Therefore, I acknowledge that the suggestions for nutrition, supplementation, and/or training that I may receive are not intended as a substitute for consultation with a qualified health care professional, such as my doctor. I release Ketonix AB from any liability related to the suggestions that I receive.

© 2018 Ketonix AB. All Rights Reserved.



​KETONIX® is a Non Invasive Class I Medical Device, registered at FDA (US) and Läkemedelsverket (SE).
KETONIX® is a Registered Trademark in US, Australia, Europe and other countries.
Ketonix AB is a Swedish Registered Company - VAT SE556443379401

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