Ketones are an efficient and clean energy source, naturally produced by the liver. When he body can't access sugar or carbohydrates, it creates ketones.

Ketosis occurs when the body converts fat into ketones, and burns these molecules as a primary fuel source — creating a highly beneficial metabolic state..

You can test ketones in your blood, breath and urine. Diets that aim to minimize sugars and carbohydrates in favor of good healthy fats achieve various levels of nutritional and targeted ketosis. When paired with periods of intermittent fasting, ketosis can be more easily and sustainably achieved.