Is Ketosis Safe?

Yes, ketosis is safe. Ketosis is a natural metabolic state that happens when you don't eat enough carbohydrates. During ketosis, the body burns fat to make ketones, an alternative fuel to glucose.

In other words, ketosis is a metabolic adaptation to change in nutrient availability. Research carried out over the past century also found ketosis to be safe [1]. And while ketosis is safe, it can cause side effects.

Ketosis Side Effects

Ketosis side effects are temporary and not serious. Most are related to the process of transitioning into ketosis, and some are directly a result of ketosis. Here are the most common ketosis side effects explained.

  • Weight loss - A sharp drop in weight during your first week on keto is due to water loss [2].
  • Keto flu - Keto flu is a collection of symptoms that happen during ketosis induction.
  • Keto breath - A fruity breath is a sure sign you are in ketosis. It is a result of acetone (a ketone body) being released through your lungs.
  • Keto rash - Some people develop an itchy rash when in ketosis [3].  It's extremely rare, though.
  • Keto headache - For some, headache is an isolated ketosis side effect. However, it is usually connected to the keto flu.
  • Decreased performance - If you're an athlete, subpar performance is a ketosis side effect you will most likely notice. Luckily, it goes away when you become keto-adapted.

Looking to learn more about ketosis side effects? Make sure you read our 10 most common ketosis side effects article.



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