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In order to receive the most accurate readings from your Ketone Breath Meter, please follow the instructions presented to you here to get the best results on the ketogenic diet.

  • Use the ketosis tester during fasted state in the morning time but not during 1 hour of waking up.
  • Do not brush your teeth, use mouth wash, smoke or consume food, beverages except water 1 hour before using and no alcohol before 24 hours of using the device.
  • Maintain good levels of hydration for accurate reporting.
  • Consume the correct amount of macronutrients for your body type

Step 1.

Press the power button for two seconds whereby the device will turn on and beep.

step 1

Step 2. 

Three (3) colored lights will appear on the device and within 10-30 seconds the device will be operational.

step 2

Step 3. 

Once Warm up is complete, the device will beep and signify the "Blow" instruction.

step 3

Step 4. 

Hold the mouthpiece to your mouth, take a natural inhale and blow with reasonably strong intensity over a period of 10 seconds.

(DO NOT take a deep breath beforehand).

step 4

Step 5. 

It is recommended but not compulsory that the user blows as much as they can of the 10 seconds, so that the sensor can detect the ketones within the breath. Meter will automatically power off.

step 5

If multiple readings are taken within a short time frame, your ketosis state is determined by the highest results, as this is an indicator of the highest concentration of ketones sitting at the bottom of your lungs that were released.

Please note that you should only be blowing into your ketosis tester, once every 3-5 minutes. Otherwise this can also lead to inaccuracies with your device.

Looking for the KHC M3 User Manual? We've got a digital version for you right here. Click on the link below for pdf version of the user manual.

KHC M3 User Manual

Once the full "Blow" period has been completed, the device will report the necessary readings whilst showing "Result" on the screen.

  • Readings of 0.00 signify the person is not in a state of ketosis.
  • Readings of 0.01 - 0.03 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 has began).
  • Readings of 0.04 - 0.15 signify the person is in full state of ketosis (the process of fats are being used by the body as the main source of energy).
  • Readings of 0.16 - 0.3 and above signify the person is in a therapeutic state of ketosis (main source of energy is healthy fats. This zone is used by doctors to help their patients combat chronic diseases). Learn more here.

Ketosis readings

The optimal zone for nutritional ketosis, according to Doctors Jeff S. Volek Phd and Stephen D. Phinney MD, PHd, is between 0.03 and 0.15 (equivalent KHC Ketone meter readings). Further information is available from their book:

The Art and Science of Low Carbohydrate Living.

Suggested testing times:

First test: before breakfast. Ideally allowing one to two hours, to compensate for the naturally occurring glucose rise upon awakening. This will give you your baseline for the day.

Second test: just before your evening meal. Generally ketones will be at their peak.

In brief, these questions are best answered by ‘what works for you!’ However, there are some basic principles, and indeed expert opinions, you may want to factor in to your personalized testing-schedule.

Firstly, the key to informed testing is consistency, not least because this will allow you to make direct comparisons in accurately assessing your level of ketosis.

Secondly, the more convenient your testing schedule is, the more likely you will be to adhere to it.

Thirdly, a twice-a-day test is generally considered a good starting point. This reveals occurring fluctuations and provides a picture of your overall baseline.

Finally, assess your own personal goals, this will re-define where you build from step three.

Optimal testing times?

Avoid the ‘dawn phenomenon.’ The dawn phenomenon relates to natural body changes that occur during the sleep cycle. In the morning, everyone experiences a slight rise in blood glucose levels and ketones are generally lower. If you have opted to test in the morning, wait for one hour (without eating or drinking) for an accurate reading.

Alternatively, test before lunch-time and/or your evening meal.

An optional approach…

Test before a meal and 60 minutes after eating. This will reveal how you are reacting to certain foods in your ketogenic diet.

Further learning:

D'Agostino, Domonic

Dr Ekberg:

Kalamian, Miriam CNS

Noakes, Tim, Professor

Please keep in mind that everybody responds to ketosis differently and that some people naturally do not reach higher states of ketosis because of their metabolism and life style which leads to lower readings. This however does not mean you will not gain the benefits of the ketogenic diet.

A high ketone reading is not necessarily better than the lower. Your body may be efficient at producing ketones but not yet practiced at using them. In fact, once you are fat ‘adapted,’ you’ll rarely see those high numbers…unless you are fasting.

Please note that fat adaptation can take up to 8 weeks for beginners on the ketogenic diet. Once the initial phase has been completed the person can now expect to see more consistent results.  

We suggest the following to improve fat burning results:

1. Use a macro calculator. This will help with adjusting your macros based upon your body type to improve results. 

2. Do not take a deep breath before blowing into the meter. Hold the mouthpiece to your mouth, take a natural inhale and blow with reasonably strong intensity over a period of 10 seconds.

3. Ensure brand new alkaline batteries have been inserted into the device before testing. A hard reset can also help if the device has been over used. Simply remove batteries and leave to rest for 24 hours and try again. We also suggest brand new batteries after the reset. 

4. Have you tried testing in a fasted state? We suggest testing after 20+ hours. 

5. Use a personalized keto diet plan that has worked for hundreds of thousands of people on keto now on discount! Go here:

6. Learn from keto professionals who specialize in the ketogenic diet listed below: 

Dr Ekberg -

D'Agostino, Domonic -

Kalamian, Miriam CNS -

Noakes, Tim, Professor -

KetoHC is not a health care provider. The information provided by KetoHC is informational only and is not intended to provide or be a substitute for medical advice, diagnosis, or treatment.

The KHC M3 breath meter uses mg/l as type of measurement to detect acetones in the breath. This is not the same type of measurement used by blood and urine ketone devices as the breath meter detects acetone.

If multiple readings are taken within a short time frame, your ketosis state is determined by the highest results, as this is an indicator of the highest concentration of ketones sitting at the bottom of your lungs that were released.

Please note that you should only be blowing into your ketosis tester, once every 3-5 minutes. Otherwise this can also lead to inaccuracies with your results.

When using your device often, it is very common that the sensor needs to be reset if you are experiencing multiple count downs with no option to blow or unusual readings.  

Please take out the batteries and leave to rest for 45-60 mins and try performing a test again.

If the device continues to cycle the countdown or give out unusual readings, then it will require 24 hrs resting period and maybe brand new batteries.

Please note that you should only be blowing into your device once every 5-7 minutes. Otherwise this can overload the sensor.

Please note that the KHC M3 Breath Meter is designed to only be used by those on the Keto diet using the proper precautions listed, as it would be impossible for us to distinguish what may or may not have triggered the sensor to get a reading.

As mentioned in the "Preparation before testing" article above, beverages other than water or foods that contain alcohols, to name a couple, could trigger the sensor. 

The KHC M3 breath meter helps you determine how many ketones your body is using rather than how many ketones your body is creating. Which is why ketones in the blood and urine do not correlate with ketones (acetones) in the breath.

The KHC M3 breath meter detects acetone, which is a by-product once the liver breaks down fat in the liver. Acetones are not detected in blood and urine ketone measuring devices.

When using the ketone meter far to often than suggested or if the sensor has been exposed to an unusual environment, the device can sometimes respond with readings that are not so common to previous readings. To resolve this issue we suggest a hard reset.

To reset your ketone breath meter, we ask that you remove the batteries from the device and leave to rest in a normal room temperature environment for at least 24 hours. Once the rest time has been completed, please insert the batteries and try again.

The device may also require brand new alkaline batteries to perform properly after the reset. 

If you opt to order via Amazon’s website or select ‘fulfillment by Amazon’ they will become your point of reference throughout the ordering and shipping process.

Please contact Amazon direct for all information regarding your order.

At KetoHC, we do not have access to Amazon’s shipping and delivery system.

You will still be able to track your shipment via the Amazon help page.

Naturally, you may still expect the quality of the Ketone breath meter.

We normally ship all orders the following business day. Average shipping time is within 1 to 3 business days for $4.95.

Once your order is placed, you'll receive an email order confirmation.

If you don't receive an email, please check your spam/junk folder or log into your account here to check your order status.

Providing your order has not reached the fulfilment center, in preparation for shipping, you may add further items in the following way:

  1. Log into your account here, alternatively please go to KetoHC homepage and log in by clicking on the ‘Login’ option – this is located at the top right hand side of the web page.
  2. Once logged in, you will be presented with the option to ‘edit’ your order.
  3. The edit process works by cancelling your original order but will automatically populate your shopping cart with your original order.
  4. From here you may add or subtract items at will.

The process is complete. We look forward to providing you with your KetoHC Ketone Meter.

Once your order is received and processed, you may view its status by logging into your account here.

You will receive an email notification the minute your order ships.

Track your shipment by using your order number and email address here.

If you accidentally used the wrong billing address when placing your order, but have received an order confirmation, no further action is necessary.

Typically, this becomes a concern if the payment is declined.

In the interest of customer security, we are unable to alter your billing address once the order has been processed.

Alternatively, you may log-in to your account here and update your billing address. In this way, the details will be correct for future purchases.

Firstly, we sincerely apologize that a part of your order is missing. We will resolve this as speedily as possible.

Please contact KetoHC customer support team:

email us:

Monday to Friday 10am – 5pm

We fully appreciate your urgency!

We will keep you informed every step of the way:

  • Once your order is dispatched, you will receive an email notification.
  • You will be assigned an order number.
  • You may track your order, from the order number and your email address.
  • Click here for tracking.

Please don’t be concerned. We are here to help.

If you are yet to receive shipping notification please follow the steps below:

  1. Log into your account here.
  2. Alternatively please navigate to KetoHC’s homepage. You will see a log-in option at the top right-hand side of the web-page.
  3. Once your account opens you will be able to edit your shipping address.
  4. If you are unable to make this edit, please contact the KetoHC customer support team.

We strive to maintain highly competitive shipping rates for our Keto community.

Pricing tariff: $4.95 - 1-3 Days Delivery (domestic orders)

If you require your order to be delivered sooner, please email Customer Support at

If you have not yet received a dispatch notification from KetoHC shipping department please follow these steps:

  • Log into your account here.
  • Alternatively, navigate your way to KetoHC homepage.
  • At the top right hand side of the web-page you will see a ‘log-in’ tab.
  • Once you have access into your account you may cancel your order.
  • If your order has already shipped, please contact the customer support team for advice.

Yes! We ship worldwide and ensure we make every purchase an enjoyable shopping experience with us.

In order to complete your purchase with Paypal your browser must be up to date with the latest version or you may try completing your order through another device.

Absolutely! We use SSL security to ensure all your personal information is encrypted. We do not store your credit card information and it will only be used one-time only upon purchasing of your product. Then your credit card information will be purged.

KetoHC direct purchases:

An important part of the purchase process is the return policy. Customers want to be assured that if they find the goods faulty, their purchased items can be returned for a full credit. At KetoHC, we do our best to resolve all customer service issues.


Only those meters purchased within 30 days will be eligible for return.

All returns must be in their original packaging.

Please be informed, returns will only be accepted with an approved ‘authorisation number’ and will be subject to quality control testing. Shipping costs will be deducted against returns that are not deemed faulty.

KetoHC Amazon Customers:

Meters purchased from Amazon will be subject to Amazon’s terms and conditions of return.

Non-returnable products:

Gift cards.

Downloadable software products.

To initiate your return, please contact KetoHC customer support here. Please have your order number readily available.


If your return is approved, your refund will be processed, and a credit will automatically be applied to the original method of payment. We do not refund to other sources.

If the product was defective, we will offer you a replacement or refund the full amount of your order, including any shipping charges.

If the product was not defective, we refund the cost of the order less any shipping charges.

Please allow a minimum of 7 days for your credit to appear in your bank account.

Further information is available at:

Please contact our Customer Support team and we'll work quickly to solve the problem. Here's how to reach us:

Contact us by email:

The KetoHC, one year warranty, is extended only to the original purchaser of the Ketone Breath Meter.

Your meter must be registered with our customer-service team before any repair or replacement may be considered.

Meter faults, incurred through mis-use, or by non-adherence to recommended guide-lines, will immediately be exempt of this guarantee.

Our team are at your disposal should you wish to initiate a return and we kindly ask you to have your product registration details to hand.

Your statutory rights are not affected.