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.
But when you cut way back on your calories or carbs, your body will switch to ketosis for energy. It can also happen after exercising for a long time and during pregnancy. For people with uncontrolled diabetes, ketosis is a sign of not using enough insulin. Ketosis can become dangerous when ketones build up.