Confit refers to a particular preparation of a food, usually a meat like duck, preserved by being salted and cooked slowly in its own fat. It can also be also a condiment made from fruit or vegetables cooked to the consistency of jam. Common non-meat confit foods, include garlic or lemons, cooked and preserved in a fat like oil or lard. A specialty of Gascony, France, the cooked meat used for confit is packed into a pot or crock and covered with fat.
Glomerular filtration rate (GFR) is a measure of the function of the kidneys. This test measures the level of creatinine in the blood and uses the result in a formula to calculate a number that reflects how well the kidneys are functioning, called the estimated GFR or eGFR.
Your health care provider will use a blood test to check your kidney function. 1  The results of the test mean the following: 2  a GFR of 60 or more is in the normal range. Ask your health care provider when your GFR should be checked again. 3  a GFR of less than 60 may mean you have kidney disease.