Can dieting cause flu-like symptoms?

People often report brain fog, tiredness and feeling sick when first starting a very low-carb diet. This is termed the “low carb flu” or “keto flu.” However, long-term ketogenic dieters often report increased focus and energy.

What are the signs of ketosis flu?

The so-called keto flu is a group of symptoms that may appear two to seven days after starting a ketogenic diet. Headache, foggy brain, fatigue, irritability, nausea, difficulty sleeping, and constipation are just some of the symptoms of this condition, which is not recognized by medicine.

Why do I get a flu when I diet?

Your body’s response to entering ketosis can often mimic symptoms of the flu, thus the name “keto flu.” Essentially, you’re feeling the symptoms of withdrawal from carbs. Your body burns carbohydrates (glucose) for energy by default so switching to a fat-burning process confuses your body.

How long does the low carb flu last?

To try and close the gap, Bostock and her team analyzed descriptions of keto flu shared on social media, noting symptoms, severity, and timeline. Certain patterns emerged, especially when it came to timing: Most side-effects peaked in the first seven days of the diet and most resolved within two to four weeks.

What are the symptoms of carb withdrawal?

Symptoms of carbohydrate withdrawal or keto induction are constipation, headache, halitosis, muscle cramps, bloating, diarrhea, general weakness, and rash [30,31].

How long until your body goes into ketosis?

It typically takes 2–4 days to enter ketosis if you eat fewer than 50 grams of carbs per day. However, some people may take longer depending on factors like physical activity level, age, metabolism, and carb, fat, and protein intake.

What does carb withdrawal feel like?

What is the carb flu?

Keto flu or carb flu is a temporary side effect of starting a ketogenic diet, also known as the “keto” diet. A ketogenic diet is very low in carbs, but high in fat and protein. The intention is to put your body in a state of ketosis, where your body burns stored fat instead of stored glucose.

When does keto flu start?

Most people report that symptoms of the keto flu often start within 24-48 hours of following a strict keto diet. This window can vary for some, however, it is unlikely to take more than seven days of strict adherence to the diet to start feeling flu-like.

Why do I feel sick when I don’t eat carbs?

A reduced supply of carbohydrates will result in reduced function, leading to headaches. Nausea can be explained through consuming high volumes of fat. This is because fat takes a long time to digest and absorb.

How long does it take for your body to get used to a low-carb diet?

This is called the “keto flu” and happens to most people who go on ultra low carb diets. If you feel unwell for a few days, you may be tempted to quit your diet. However, keep in mind that it may take 3–4 days for your body to adjust to your new regimen, and full adaptation may take several weeks.