why do you fast before a blood glucose test
Type 1 diabetes is usually diagnosed in children and teenagers whose bodies arenвt able to produce enough insulin. Itвs a chronic, or long-term, condition that requires continuous treatment. Late-onset type 1 diabetes has been shown to affect people between the ages of 30 and 40. Type 2 diabetes is usually diagnosed in overweight and obese adults, but it can develop in younger people as well. This condition occurs when your body doesnвt make enough insulin or when the insulin you produce doesnвt work properly. The impact of type 2 diabetes may be reduced through weight loss and healthy eating.
Gestational diabetes occurs if you develop diabetes while youвre pregnant. Gestational diabetes usually goes away after you give birth. After receiving a diagnosis of diabetes, you may have to get blood glucose tests to determine if your condition is being managed well. A high glucose level in a person with diabetes may mean that your diabetes isnвt being managed correctly. , or overactive thyroid, or inflammation of your pancreas
prediabetes, which happens when youвre at increased risk of developing type 2 diabetes stress to the body from illness, trauma, or surgery In rare cases, high blood glucose levels could be a sign of kidney failure, a hormonal disorder called, or, which occurs when your body produces too much cortisol.
Itвs also possible to have levels of blood glucose that are too low. However, this isnвt as common. Low blood glucose levels, or hypoglycemia, may be caused by:, or underactive pituitary gland, or underactive thyroid, which is characterized by low levels of cortisol, which is a type of pancreatic tumor Some blood tests will require you to fast beforehand.
In these cases, your doctor will instruct you not to eat or drink anything, except water, in the hours leading up to the test. Fasting before certain blood tests is important to help make sure that your test results are accurate. The vitamins, minerals, fats, carbohydrates, and proteins that make up all food and beverages can impact blood-level readings, clouding the results of your test.
Not all blood tests will require you to fast beforehand. Blood tests that you will likely need to fast for include: If your doctor has prescribed a new blood test for you, or doesnвt mention whether or not you should fast or for how long, ask them if fasting is required. Some tests, such as a fecal occult blood test, donвt require fasting but do limit certain foods. Red meats, broccoli, and even some medications may cause a false positive test. Always follow your doctorвs advice when preparing for a test.
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