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Ketosis symptoms are a function of the way the body gets rid of the excess ketone bodies which build up in the blood stream when a person eats a low carb, ketogenic diet.
In short, the body has three ways of dealing with excess ketone bodies:
First, the muscles liver and brain can burn them for energy in the cells.
Second, the body can breathe ketones out through the lungs.
And third, the body can flush ketones out through the kidneys and urine.
The ketosis symptoms associated with the benign dietary ketosis caused by eating a low carb, ketogenic diet are not dangerous. They may differ for each individual, with the most common symptoms being:
Ketosis breath, which has a fruity odor, and the person in deep ketosis may feel a sort of slight burning in the nose and a slight smell of ammonia.
Dry mouth, which is alleviated by drinking more water.
A slight headache at first which goes away in a few days.
In the first week of beginning a ketogenic diet, most people experience frequent urination followed by fatigue, as the kidneys release extraneous water stores. Minerals such as sodium, magnesium and potassium are also lost with excreted urine, and it is the mineral loss that causes the fatigue. This can be offset by eating more salt, drinking more fluids, and increasing the intake of magnesium and potassium containing foods. (Dairy foods and avocados are high in potassium, and you can drink broth for more sodium.)
Ketone bodies become detectable in the urine. Ketone bodies are leftover fragment molecules created by the natural process of burning body fat for fuel. Diabetics and low carb dieters use a product called Ketostix to check for the presence of ketones in the urine, although each group does this for different reasons. If ketones are present, the stick turns purple.
After several days of ketosis, there may be a sense of euphoria, or an experience of high energy.
Very clear thinking, and a lack of “brain fog”.