KETONIX® Breath Ketone Analyzer

The Original - Biohackers Choice Since 2013



Buy your Ketonix® Breath Ketone analyzer in our Online Shop, open 24/7. Worldwide Shipping from Sweden with DHL Express, Delivery time 2-5 days.


Software, Manuals, Warranty, Return, Troubleshooting,  Technique, etc.




Here is information for how to use the Ketonix® Breath Ketone analyzer in a clinical view. Science behind the ketogenic diet and the difference between measuring blood and breath ketones.


Here you find interviews, instructional and troubleshooting videos.




This is the place for you who want's to find out more about the ketogenic diet. What it is, how it's working and how to calculate the right mix of macronutrients and more ...


Learn more about Ketogenesis, Ketonix basic, and Ketonix coaching.



Why breath ketones indicate ketosis better than other methods.

When the primary ketone is created by the liver, some of these ketones turns into breath ketones. Breath ketones have a good correlation to the breakdown of fatty acids into ketone energy.

When cell’s energy need decrease, cell's can repackage the primary ketone into a molecule that
 can stay in blood until cell energy need increase again. In other words, when the need for ketones
 decrease (ketosis decrease), blood ketones are formed. The blood ketones could be unpacked 
and used by any other cell at any time, so the value of blood ketones is not an indicator of strength, it’s more a trace of ketosis. The concentration could even be lower when ketosis increase as the 
cells would use any available energy.

The ketones in the urine are excess ketones that are not “saved” in blood when energy needs decrease.
The concentration of urine ketones depends on fluid logistics.

Breath ketones reflect the intensity of breaking down fatty acids into ketone energy. Blood ketones indicate
there is some “leftover/saved” ketone energy that is not used yet. Urine ketones indicate excess ketones 
that could not be saved in blood.

To monitor how lifestyle affects ketosis, breath ketones are the superior method.

Research using mice or rats don’t have many options that using blood tests. This is probably the main 
reason why blood ketones are referenced in many studies. Another reason is that many other blood values are measured and it is "easy" to add the measure of blood ketones in the lab test.

Blood accuracy have been claimed to be better than breath, well if aiming to measuring how much ketone energy 
that wasn’t needed and still haven’t been used yet is the purpose, blood ketone measuring is perfect. This is exactly
 what people with type 1 diabetes want to know … is it building up blood ketones? Am I getting into ketoacidosis?
 It does not say the “level” of ketosis more the level of ketoacidosis. A better indicator if drawing blood would be to look at the blood sugar.
The GKI (Glucose to Ketone Index) is a calculation that relives the blood ketones from the burden of indicating
 ketosis by adding glucose into the equation. As blood ketone only is a small buffer of excess energy that is kind of volatile, the glucose 
part of the calculation would better tell the story of fat being used in favour of glucose.

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Does Breath and Blood ketones correlate?


They have a vague correlation - the higher breath ketone levels measured, the higher the probability is of finding blood ketones.

Breath ketones correlate to ketogenesis (stored/digested fat that turns into ketones). The higher breath ketones, the more fat is metabolized in the liver.

Phase 1: When energy needs increase, and there is a limited amount of carbohydrates to use for energy, ketogenesis starts and make ketone energy. In this phase, both the primary ketone AcetoAcetate and the blood ketones (beta-hydroxybutyrate, if present in the blood) is consumed. Breath ketones are proportional to the AcetoAcetate created. No blood ketones are formed in this phase. View animation

Phase 2: When energy needs decrease, the liver is still producing AcetoAcetate, and cells have enough energy. The cells are intelligent and can "repackage" the AcetoAcetate into the storage form beta-hydroxybutyrate (blood ketone) and leaves it into the bloodstream for later use when energy needs increases again. Breath ketones are still proportional to the AcetoAcetate created and decrease along with the production of AcetoAcetate. The blood ketones signal that energy needs are decreasing and the liver will produce less AcetoAcetate. View animation

So when energy need increase (and carb availability is low) ketones are made and used (if you had any blood ketones, they would be used to and level decrease). Ketosis increase and breath ketones rise.

When energy needs decrease, the cell's save excess ketone energy into blood ketones. The blood ketones signals decreasing the need for energy and ketosis also decrease (so will also your breath ketones).

The level of blood ketones reflects how much the cells saved when the energy needs decreased, not the level of ketosis. Comparing levels of breath and blood ketones is therefore complicated as they are not formed under the same circumstances.


Care about Health and Want to Change your Lifestyle?

Health is a great concern for most of us. Many of our modern diseases originates from our diet. Many struggle to lose weight, others have medical issues that drugs only help to cover the symptoms.

Maybe you want to stay focused and energized throughout the day? Fueling your brain with ketones will turbo charge your brain energy, no more need for sugar fixes.

To lose weight or use a ketogenic diet for therapeutic in treatment of type 2 diabetes, epilepsy, cancer etc .. a lifestyle change that gets your body into ketosis might help.

Does Your Diet Work?

So making a lifestyle change like "eating low carb" or "taking a walk before breakfast" ... does it work?

Are your macro nutrients optimised for you? Some can use dairy products, some can not. Some need to go lower on carbs than others. Some react on sweeteners ... etc.

How do you know if your changes really increase your metabolism?

Monitor Your Results

Ketonix® measures your breath for ketones and you will instantly know how much your body use fat as fuel.

An instant response on how your lifestyle changes affects your body's use of fat.

if you use a ketogenic diet for therapeutic use, you get a realtime feedback of your level of ketosis. If you want, your doctor/nutritionist could also see your improvements and coach you when needed. 

A good indicator of your success is when you see a trendline that is green like in the screenshot to the right here.

Measure anytime

You can easily measure when you are on the move.

At the office, business trip or even when you are out hiking, you can monitor your ketosis.

The app's functions for trend and moving average makes it easy to know when you need to boost your ketosis.

Maybe a session at the hotel gym, or take a walk and do some sightseeing?

With Ketonix® you will learn how to keep your ketosis and when to apply your knowledge.

Ketonix® is Connected

Connect your Ketonix® to Heads Up Health and track your exercise, food macros and all your other data.

Using Heads Up Health consolidates your health to one stop analysis.

Connecting your Ketonix® to Heads Up Health you can easily identify how food and exercise affects your fat burning.

When you connected your other fitness gadgets and food tracking app to your account, you are in power and can make decisions that keeps you on track and reach your goals.

Changing Your Lifestyle


Read the review by
Ketogenic Supplement Reviews

KETONIX - Biohackers Choice Since 2013


A solid device that does it's job well

When you have read and understood the instructions, and you understand what you are measuring - which is an important point, then this device is very good. The fact that it is reusable without having to buy test strips or similar, is great as it means you can test every 10 minutes throughout the day if you wish, and it doesn't cost any extra.
Just remember that your acetone results will not always correlate with your B-HOB,***This is not a fault***.

I absolutely love it

I purchased this on Amazon on July 26th of this year. It took me a week or so to understand it's benefits and how to use it effectively. I absolutely love it. It gives me inexpensive, convenient and individual assessment of my lifestyle's (diet, exercise, sleep, etc effect on ketosis. Michel, is always supportive and helpful when I have question. An imperative tool if you are interested in therapeutic or nutritional ketosis.

An excellent device

This is a brilliant device and is really important if you want to get into and stay in nutritional ketosis. I had some connection problems and the device had to be replaced ( no problem).

Why Choose Us?

We use our product!

The founder of Ketonix have epilepsy and needed a tool to manage his ketosis. We who work here use a low-carb diet for health and stay focused, the Ketonix device enables us to tweak our lifestyle and optimize our performance.

Our Support is in Ketosis
Money Back Guarantee


Our mission is to provide a simple, cost effective and painless method to know if your body is in ketosis and the strength of it. With the insight of your level of ketosis you could adjust your actions to increase/maintain your ketosis.

Ketosis is when your insulin levels are low and your liver starts to metabolize fat into ketone energy. When ketones fuel our brain we sense a high mental clarity and energy boost. Without the ability to get into ketosis when glucose and glycogen is low the human man kind would not exist.

Ketosis is not the the same condition as Ketoacidosis. Ketoacidosis is is a complication of type 1 diabetes mellitus. It's a life-threatening condition resulting from dangerously high levels of ketones and blood sugar


Ketonix® analyze your breath for the ketone named Acetone. Acetone is spontaneously released from the liver when ketone energy is formed.

The more fat that is mobilized into energy, the more Acetone in your breath.

Don't mixup breath ketones with blood ketones. Blood ketones are formed from excess ketone energy and could be converted back into energy at any time. In some situations one could say that they correlate, higher breath ketone level and you might find more blood ketones. Then add that your body could have issues both creating them and use them for energy, these factors makes it harder to interpret blood ketones. This is one of the reasons Ketonix® was invented, to indicate the strength of ketosis.

KETONIX® - Breath Ketone Analyzer - The Original Biohackers Choice Since 2013

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

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