Or, if it is used for the long term, there have not been studies yet to see how this impacts our health. If you decide to go keto, have a doctor monitor your cholesterol levels monthly to ensure you remain within a healthy range. Experts break down the ketogenic diet and explain common keto diet side effects. A keto diet tricks the body into burning fat, said lead author Vishwa Deep Dixit of the Yale School of Medicine. When the body’s glucose level is reduced due to the diet’s low carbohydrate content, the body acts as if it is in a starvation state — although it is not — and begins burning fats instead of carbohydrates.