How Long Does It Take To Get Into Ketosis?

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How long does it take to get into ketosis? This is an important question for any person interested in entering a state of nutritional ketosis. If you’re looking for a quick fix and want to lose weight quickly, then the answer is that it doesn’t take longer than 5-10 days! The same goes for beginners who are trying to build up their muscle mass. However, if you have been following a strict RKD (rapidly kindled diet), then it could take up to three weeks before you have reached your goals. In my opinion, there is no reason why you should need more than 10 days; however, there are many factors that can affect how fast your body will be able to become keto-adapted such as exercise, stress levels/mental health issues etc.

What is Ketosis?

Ketoacidosis is a metabolic state where your body burns fat for fuel instead of carbohydrates. This is usually associated with diabetes, but it can also occur when you don’t eat enough carbohydrates and have been fasting on an empty stomach (for example, if you’re doing intermittent fasting).

Ketosis happens when you eat fewer carbohydrates than usual, which happens most often in people who are restricting their carbohydrate intake due to a medical condition like Type 1 diabetes or ketoacidosis. The ketogenic diet aims to mimic this process by restricting carbohydrates in order to force the body into entering into a state of ketosis—a metabolic state where your body burns fat for energy instead of consuming glucose from food sources such as bread or pasta.

How Long Does It Take to Get Into Ketosis?

How long it takes to get into ketosis depends on how long you’ve been eating a high-carb diet. On average, it can take 1-3 weeks for the body to start burning fat as its primary fuel source and shift over from glucose (sugar) burning.

If you’ve been following a high carb diet for years, then it will probably take longer than 2 weeks for your body to become keto-adapted. If this sounds like something that would happen in real life, remember that there are many different ways of entering ketosis and none of them is particularly quick or easy! Getting into ketosis will depend on the amount of time it takes your body to adjust to using fats for fuel. However, generally speaking, it takes about 3-4 days for your body to start producing ketones and up to 2 weeks for them become very noticeable (i.e., you’ll have an increased sense of being full when eating).


If you’re on a ketogenic diet, then it can take up to about two weeks for your body to get into ketosis. However, if you are only doing intermittent fasting or eating very low carb meals, then this may not be the case. If you’re unsure how long it will take your body to get into ketosis, you should check out our guide on how long does ketosis last?


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