The 11 Most Common Keto Side Effects

This means that instead of generating tons of ketones from the very beginning, most people experience hypoglycemia for a period of time. With hypoglycemia comes a disruption in cortisol signaling which is what accounts for the HPA axis dysfunction. Finally, HPA axis dysfunction leads to an increase in secretion of minerals from the body in the urine.

Together these three causes can create all kinds of side effects. Once you understand them, though, a little bit of extra planning can help mitigate them from ever happening.

Hypoglycemia 

As I briefly mentioned already, hypoglycemia is the first underlying cause to contribute to side effects during keto-adaptation. This is because the body simply doesn’t know how to burn fat for energy yet.

During the adaptation phase, people commonly feel brain fog, fatigue, dizziness, intense hunger, irritability, and depression.

Although hypoglycemia and its side effects should subside within weeks of beginning a ketogenic diet, look out for these signs and take steps to support your body during this time.

Keto Flu 

This is perhaps one of the most well-known ketogenic diet side effects. Keto flu is exactly what it sounds like, the onset of flu-like symptoms that arises shortly after beginning a ketogenic diet. This includes symptoms like fatigue, runny nose, nausea, and headache.

Keto flu is a classic manifestation of hypoglycemia that can be corrected with simple strategies that I will outline shortly.

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