Many health insurance plans have an out-of- pocket expense maximum. An out-of-pocket expense is a nonreimbursable expense paid by a patient. But out-of-pocket expenses can also include covered expenses that you are responsible for before your health-plan benefits kick in at 100 percent coverage.
The process of ketosis is one of the physiological effects of fasting in which the brain (and some other bodily processes) uses ketones produced from fatty tissues as a fuel instead of the usual glucose. This is called muscle sparing.
During ketosis, ketones are produced from the breakdown of fats in the liver. When the body is overloaded with fats, and carbohydrates are taken away, this causes it to burn ketones as the main energy source. This is the end goal of a ketogenic diet, and what ultimately results in weight loss.