How Long Does Keto Flu Last (And Why)?

Exact Answer: 1 to 3 weeks

Flu can come up anytime, anywhere, unannounced, and enter the body without any prior warnings and no reason. All these health problems are not always the result of weak immune systems and poor lifestyles. Some can also be due to malnutrition and food devoid of the right essential nutrients. Keto flu is also popularly known as carb flu since it happens when there is a drastic change in diet. Sometimes, people have a hard time discerning flu from cold, as most of the times, they have similar symptoms.

Yet, the medication is different for each flu and though keto flu is not a real illness, there are medicines and remedies for that too. People love taking the easy route to achieving their goals, yet most of them don’t know that it also has its shortcomings. The Keto diet is one such process. Keto diet is nowadays very popular among countries all over the world, as it helps people lose weight naturally without much strain, and it also improves health and lifestyle for so many people.

While some people’s bodies adapt to the keto diet, some bodies don’t. Normally, keto flue lasts for about 1 to 3 weeks. For some, the diet is perfectly safe, while for some, it can lead to very uncomfortable side effects.

How Long Does Keto Flu Last

How Long Does Keto Flu Last?

Symptoms peak in7 days
Symptoms resolve within2 to 4 weeks
Keto flu goes away within1 to 3 weeks

The Keto diet is a diet that is very low in carbs, moderate in protein, and high in fat. The reason keto flu is also called carb flu is that the symptoms occur when the diet is very low in carbohydrates. When one is allergic to a keto diet, the symptoms begin once people start the diet. Some reasons explain why the symptoms occur and how to ease them. The keto flu is not technically the flu, and it is the series of symptoms one experiences once one begins the diet.

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The reason it is called the keto flu is that the symptoms of this problem are similar to the common flu. When carb intake is reduced, the body burns out ketones instead of glucose, and ketones are by-products of broken-down fat. Ketones are the main source of weight loss and energy in ketogenic diets. Normally, energy is obtained from carbohydrates, and when there is a very little amount of carbs in the body, fat is burnt, which will produce energy.

When someone starves or fasts, the fat is burnt and turns into energy, and this process is called ketosis. This sudden change in the carb intake will lead to withdrawal symptoms, and the symptoms can be similar to the one of alcohol, drug, and caffeine withdrawal, or from any addictive substance.

Why Does Keto Flu Last That Long?

The symptoms of the keto diet can be different from one person to another. While some people can transition from the diet without any sort of side effects, while some experience symptoms like vomiting, nausea, fainting, dizziness, diarrhea, muscle cramps, lack of concentration, headache, and many others. These symptoms begin when the diet begins and end after the diet is stopped. Yet, sometimes, the symptoms can last even after the diet is stopped.

Initially, the symptoms of keto flu begin on the first day of the diet and will peak in seven days. The symptoms will resolve themselves within about 2 to 4 weeks after the diet is stopped. The flu goes away itself in about 1 to 3 weeks, depending upon the strength of the diet and health conditions of the individual’s body.

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There are many ways to get rid of the symptoms, like staying hydrated. Since watersheds a lot during the keto diet, it is important to stay hydrated. It can help with symptoms like muscle cramping, fatigue, and vomiting. Avoiding strenuous exercise is also very much important so that no more fat gets burnt since there are no carbs in the body to be burnt.

Replacing electrolytes is also important and it can reduce the keto symptoms a great deal. Getting enough sleep, cutting off the intake of alcohol and caffeine, relaxing, meditating, and even waking up early can help a great deal.


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Hi! I'm Nidhi.

Here at the EHL, it's all about delicious, easy recipes for casual entertaining. So come and join me at the beach, relax and enjoy the food.

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