8. Nutritional deficits
The ketogenic diet can cause your body to shed sodium, potassium and water, which can cause nutritional deficits resulting in 'keto flu' symptoms.

Usually the body can adjust to these changes in your electrolyte levels, but if you're smashing litres of water in a plea to stave off feelings of hunger or dehydration, you might be contributing to this imbalance of electrolytes by overhydrating.

Question is: how do you fix it? Some suggest supplementing sodium and potassium (these are plentiful in sports drinks, if you can squeeze on into your diet), but we say chat to a professional first. Messing with your electrolytes can be harmful, especially if you end up getting too much.