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What is the Ketogenic Diet and How to Measure if You're in Ketosis

Keto Urine Strips

Urine sticks are the cheapest and easiest way to measure for ketosis

With a keto stick, you hold the stick in your urine stream for a few seconds, and within a few seconds there should be a color change in the strip (if you are in ketosis)

When ketone body levels increase, they are just excreted through your urine instead of having to be stored back as fat

However, this is not always a reliable test. Once your body is in a “keto-adapted” state and you get deeper into ketosis, your body adapts and becomes more optimized in ketone production

Disadvantage: not that accurate

Advantage: cheap

Feeling of Ketosis

Keto Flu/Focus and Mood

Tiredness and feeling sick when first starting a keto diet; This is termed the "low carb flu" or "keto flu." - usually due to the loss of electrolytes

When you get into ketosis, a large part of the brain starts burning ketones instead of glucose. It can take a few days or weeks for this to start working properly.

Ketones are an extremely potent fuel source for the brain and can cross the blood-brain barrier - have been used to treat brain diseases and conditions such as concussion and memory loss

Long-term ketogenic dieters often report increased clarity and improved brain function

Keto Breath

Your body makes small amounts of acetone as it’s made during the breakdown of fat

The liver breaks down acetone to chemicals that are not harmful - The amount that is not broken down leaves your body mostly in the air that you breathe out and a small amount leaves the body through urine

The smell can vary, but it usually has a fruity (like the smell of rotten apples) smell – usually likened to the smell of nail varnish remover (acetone is a chemical in nail polish remover)

However, keto breath does not affect everyone in ketosis and tends to disappear once keto-adapted

LEVL Breath Meter

Keto breath meters are extremely accurate and a simple way to check for ketosis, without a urine or blood test - you simply breath into the meter and it lets you know whether or not you are in a ketogenic state

There’s a correlation between the amount of acetone detected in the breath and body fat burned, giving you a reliable indicator of fat loss.

LEVL is a FDA Class I medical device that is designed to detect trace amounts of acetone in your breath when your body is burning fat (even if you don’t have “keto breath”)

You breathe into the device and your breath is analyzed by a nanosensor within the device that gives you an immediate reading of your body’s acetone concentration

When your body shifts to utilizing fat for energy your breath acetone concentration increases - This increase usually occurs over the course of 3-7 days, until you reach an elevated level of breath acetone

The LEVL device is measured in PPM, an abbreviation that means of Parts Per Million, of acetone in exhaled breath.

A breath measurement of 2 PPM or greater indicates an elevated state of fat metabolism that should correspond to a loss of at least ½ lb. of body fat per week

The device is not only used to help you achieve nutritional ketosis, but it can also monitor how diet and exercise are impacting acetone in your body so you can be sure you’re burning the maximum amount of fat.


If you consume too many carbs your body will switch back to running on glucose, which will result in an acetone concentration reduction over the course of 1-2 days - or can be used if you are unsure about your current state of ketosis

1) Measuring Ketosis: What are Keto Sticks and Keto Strips? | Ruled Me. (n.d.). Retrieved from [ Ссылка ]

2) 10 Signs and Symptoms That You're in Ketosis. (n.d.). Retrieved from [ Ссылка ]

3) Acetone | CH3-CO-CH3 - PubChem. (n.d.). Retrieved from [ Ссылка ]

4) ATSDR - Public Health Statement: Acetone. (n.d.). Retrieved from [ Ссылка ]

5) Science - LEVL. (n.d.). Retrieved from [ Ссылка ]
6) Using LEVL - LEVL. (n.d.). Retrieved from [ Ссылка ]

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