Your body is used to the simple routine of breaking down carbohydrates and using them as energy. Over time the body has built up an arsenal of enzymes ready for this process and only has a few enzymes for dealing with fats – mostly to store them.
All of a sudden your body has to deal with the lack of glucose and increase in fats, which means building up a new supply of enzymes. As your body becomes induced into a ketogenic state, your body will naturally use what’s left of your glucose.
This means your body will be depleted of glycogen in the muscles – which can cause a lack of energy and general lethargy.
In fact, you should go overboard with the salt – salt everything! Sodium will help with water retention and help replenish the electrolytes. For most, this temporary groggy feeling is the biggest danger you’re going to face. It’s called the “Keto Flu.”