How Long Does It Take to Get into Ketosis?

The ketogenic diet is one of the most popular low-carb diets in the world.

It helps your body transition from glucose (a kind of sugar) to ketones as its major fuel source (compounds formed by the breakdown of fat that acts as an alternate fuel source).

A ketogenic diet not only aids in weight loss, but it’s also linked to lots of other benefits, such as increased HDL (good) cholesterol levels and lower blood sugar, insulin, and triglyceride levels.

However, some individuals find it far more difficult to enter ketosis than others. Furthermore, many people struggle to get into ketosis in the first place.

This post will explain how long it takes to go into ketosis and why you may not be there yet.

How long does it take to enter ketosis?

For the ketogenic diet to work for you, your body must go into a state called ketosis.

In this metabolic state, your body turns fat into molecules called ketones, which it uses as its main source of energy when glucose, which is a type of sugar, is scarce.

The best way to get into ketosis is to drastically cut down on the carbs you eat.

In your digestive tract, carbs are broken down into sugar molecules like glucose. This way, they can travel through your blood and be used for energy. You can store extra glucose in your liver and muscles in the form of glycogen, which your body can use when it needs it again.

Cutting back on carbs so much that you only eat 50 grams per day forces your body to use up its glycogen stores and eventually switch to using ketones as fuel.

The amount of time it takes to get into ketosis varies from person to person.

There are two to four days if you have 20–50 grams of carbs a day. This isn’t always the case, though. Some people may need a week or more to reach this point.

Some things that can affect how long it takes to get into ketosis include how much carbs you eat each day, how much fat and protein you eat each day, how much exercise you do, and how old you are.

People who usually eat a lot of carbs before starting a keto diet may take longer to get into ketosis than people who usually eat a lot of carbs. This is because your body needs to get rid of its glycogen stores before going into ketosis.

You can also enhance your ketosis speed and state with the Kapex supplement from Bioprimizers.

Signs Of Ketosis

As your body enters ketosis, you may suffer several symptoms, which are commonly referred to as the “keto flu.” Headaches, weariness, nausea, poor breath, and increased thirst are some of the symptoms.

While these symptoms may indicate that your body is shifting, the best approach to determine whether or not you’re in ketosis is to test your ketone levels.

Ways to measure Ketone levels

The easiest way to tell whether you’re in ketosis is to test your ketone levels.

Acetoacetate, acetone, and beta-hydroxybutyrate are the three kinds of ketones that may be measured in urine, breath, and blood, respectively.

Acetoacetate levels in urine may be tested with a ketone urine strip, which changes color based on the ketone amount in your urine. Darker hues usually indicate that your urine contains more levels.

Urine testing strips are a cheap and easy way to determine whether you’re in ketosis. They are, however, not as precise as other instruments.

Acetone levels may be determined with a ketone breath meter, such as the Ketonix. This meter flashes a color to indicate whether you’re in ketosis and how much ketone is in your blood.

According to research, ketone breath meters are pretty accurate.

A blood ketone meter, which operates similarly to a glucometer—a gadget that monitors blood glucose levels at home—is used to test beta-hydroxybutyrate levels.

To use a blood ketone meter, just prick your finger with the little accompanying pin and draw blood, then let the top of the strip come into contact with your blood.

Ketone Levels that indicate Ketosis

A blood ketone level of more than 0.5 mmol suggests that your body is in the process of developing ketosis. That said, a blood ketone range of 1.5–3.0 mmol per liter is optimum for staying in ketosis.

While blood ketone meters are excellent at measuring ketones, the strips are rather pricey compared to urine testing strips.

Ketone measurement tools should give you an accurate picture of whether you’re in ketosis. This tells you if you need to make changes to enter or remain in this condition.


As a general rule, it should take you about two to four days to get into ketosis.

Some people may also need a week or more. The amount of time it takes depends on a lot of things, like your age, metabolism, exercise level, and current carb, protein, and fat intake, among other things.

Use a measuring tool to find out whether you’re in ketosis. You can use breath, urine, or blood ketone measuring tools to do this.


  • Simeon Clark

    Biohacker, Holistic Health Advocate, and an explorer of the body's natural healing mechanisms. He lives in North Florida. Simeon secretly believes intermittent fasting is a wonder drug everyone should add to their diet. Other than that, He's always looking out for products and programs that are TRULY beneficial to the body.

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