Whilst in the Partial Ketosis stage, your body begins to burn fat. After fasting for approximately 12 hours, the liver starts breaking down fats and producing ketones. The duration of fat burning rises from sixteen to twenty-four hours. Many individuals who fast frequently claim that sixteen-hour fast yields the finest effects. The benefits of 16-hour fast include benefits in weight loss, inflammation, and overall health. Many individuals also notice enhanced mental clarity and concentration.