Diabetes Glossary

Browse or search for definitions from our comprehensive list of diabetes terms.

Browse Glossary: "f"

fasting blood glucose test

a check of a person's blood glucose level after the person has not eaten for 8 to 12 hours with diabetes.

fat

1. One of the three main nutrients in food. Foods that provide fat are butter, margarine, salad dressing, oil, nuts, meat, poultry, fish, and some dairy products. 2. Excess calories are stored as body fat, providing the body with a reserve supply of energy and other functions.

fatty acids

a basic unit of fats. When insulin levels are too low or there is not enough glucose id levels in the blood to become too high. This in turn may lead to ketoacidosis, a serious problem. See also: diabetic ketoacidosis.

fiber

a substance found in foods that comes from plants. Fiber helps in the digestive process and is thought to lower and help control blood glucose blood fats and blood glucose. Insoluble fiber, found in whole-grain products and vegetables, passes directly through the digestive system, helping to rid the body of waste products.

fluorescein angiography

fluh-RESS-ee-in an-gee-AH-grah-fee

a test to examine blood vessels in the eye; done by injecting dye into an arm vein and then taking photos as the dye goes through the eye's blood vessels.

food exchange

See: exchange lists.

foot care

taking special steps to avoid foot problems such as sores, cuts, bunions, and calluses. Good care includes daily examination of the feet, toes, and toenails and choosing shoes and socks or stockings that fit well. People with diabetes have to take special care of their feet because nerve damage and reduced blood flow sometimes means they will have less feeling in their feet than normal. They may not notice cuts and other problems as soon as they should.

fructosamine test

frook-TOH-sah-meen

measures the number of blood glucose molecules (MAH-leh-kyools) linked to protein molecules in the blood. The test provides information on the average blood glucose level for the past 3 weeks.

fructose

FROOK-tohss

a sugar that occurs naturally in fruits and honey. Fructose has 4 calories per gram.

    Disclaimer

    Our glossary includes and builds on the definitions found in The Diabetes Dictionary (NIH Publication No. 07-3016, October 2006) published by the National Diabetes Information Clearinghouse, which is available on their website and is not copyrighted. The Clearinghouse encourages users of this publication to duplicate and distribute as many copies as desired.

    The U.S. Government does not endorse or favor any specific commercial product or company. Trade, proprietary, or company names appearing in this document are used only because they are considered essential in the context of the information provided.

    The National Diabetes Information Clearinghouse (NDIC) is a service of the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). For more information, visit their website at www.diabetes.niddk.nih.gov.