3.You Might Get the “Keto Flu”
Ketosis can lead to weakness, fatigue, dizziness, and headaches, which can feel a lot like flu symptoms. More serious side effects can happen too, like stomach pain, nausea, and vomiting. Some doctors think this is caused by not getting enough nutrients from fruits, beans, veggies, and whole grains — foods not allowed, or strictly limited, on a keto diet.
4.You May Have Brain Fog
You may feel foggy as your body tries to keep up normal blood sugar levels. It might be hard to sleep at first. You might feel very tired, which will make your brain feel even fuzzier for a while.
