There are some blood tests that are extremely sensitive to food or drink. It is necessary for a patient to fast for several hours prior to having one of these tests drawn. It is important to find out if fasting is required for the type of test...
Many blood tests require fasting for a certain amount of time -- anywhere from six to 14 hours, depending on your doctor's instructions -- before you have your blood drawn. What you should eat before starting your fast varies according to the type...
Your doctor may have prescribed a fasting blood test to reveal your health status or risk factors for disease. If you're not used to fasting, this seemingly simple requirement can raise many questions about what you can and can't eat, drink or...
People who drink aloe vera for health benefits may have to forego that regimen when they have blood work done. A correct analysis of some tests depends on an absence of foreign substances in your blood specimen. You may be requested to fast for up...
When your doctor orders a fasting blood test, you will be instructed to fast for a specific period before having your blood drawn at the laboratory. Fasting blood work requires that you not eat or drink anything other than water for the specified...
When fasting for a routine or diagnostic blood test, the only item allowed on your menu is water. Most beverages, including tea and milk, contain water, but their additional components can affect your blood makeup and alter your test results. Any...
The levels of some substances in your blood vary substantially, according to when and what you last ate. To control for variability introduced by eating, you must fast for a specific number of hours before certain blood tests. Although most diet...
Caffeine addicts must pay special attention to their doctors' orders for blood tests needed for routine health checks and diagnostics. Depending on the type of blood work, typical laboratory protocols can upset your coffee-shop routine with...
Usually, when your doctor wants to check your cholesterol scores, the blood is drawn first thing in the morning so that you won't eaten for at least eight hours in what is known as the "fasting state." Why? One reason is the increase in...
When your body stores too much iron, your liver may be affected and release certain enzymes into your bloodstream. Your health-care provider may wish to test your blood for any or all of several liver enzymes or for various indicators of your iron...
There are thousands of blood tests, and quite a few of them require a fasting blood specimen. The instructions for the test give a time frame such as overnight, nothing after midnight or something similar. The rules for fasting before a blood test...
More than 100 million adults in the United States have high cholesterol levels, according to the Centers for Disease Control and Prevention, and 35 million of these Americans have levels high enough to put them at risk for developing heart...
Diabetes interferes with the production of insulin and use of glucose. Blood glucose levels become elevated, wreaking havoc with the other organ systems in the body. In order to diagnose diabetes or its precursor, pre-diabetes, a fasting plasma...
The fasting blood glucose test is part of most regular medical checkups and your doctor may also order one if she suspects you have hypoglycemia or diabetes. If your fasting glucose is between 50 and 100 mmol/L, you have normal glucose. If your...
Some blood tests, such as the tests to measure total cholesterol or blood glucose levels, require you to fast for a set amount of time before the test. Your doctor may ask you to fast anywhere from two to 12 hours before your test. Having foods...
Health practitioners will often order a fasting blood glucose test in order to determine if you have a condition such as diabetes. Diabetes results when your body does not produce enough insulin to transfer your blood glucose into the cells....
A fasting blood glucose test measures the amount of glucose -- or sugar -- in the blood at the exact time the sample is taken, without the interference of outside factors such as food or beverages that may affect the results. Your doctor may order...
There are many different times you can test your blood sugar. While a fasting blood sugar test, one taken when you have not had anything to eat or drink for the previous eight hours, is typically used to diagnose diabetes, testing at other times...
Dr. Robert C. Atkins developed the Atkins Diet in the 1970s as a weight-loss tool. The most recent version of the diet, published in "The New Atkins for a New You: The Ultimate Diet for Shedding Weight and Feeling Great" is by three researchers in...
A fasting blood sugar level is usually ordered by a physician either to check for a new diagnosis of diabetes or to monitor a person who is known to have diabetes. Ideally fasting blood sugar is tested shortly after the person gets up in the...
Getting your blood drawn requires a trip to the lab, so health care providers often request that several tests be performed on one blood specimen. Common blood work for multiple issues includes glucose tolerance tests to check for diabetes and...
Triglycerides are the form in which fat is packaged and stored in the body. They are present in higher amounts in the bloodstream after a meal, when excess calories are being stored for later use. People with certain conditions may have...
Cholesterol tests measure the amount of total cholesterol in the blood, and usually measure low-density lipoprotein, the "bad" cholesterol levels, and high-density lipoproteins, the "good" cholesterol. Traditionally, medical personnel have told...
Digestion breaks down some of the food you eat into sugars that enter your blood. These sugars, called glucose, provide the energy and fuel for the cells of your body, explains the National Diabetes Information Clearinghouse. In order for the...
If you're a caffeine aficionado, you may be dismayed to find coffee on the list of items that you can't have when preparing for a fasting blood test. Blood samples taken to evaluate your glucose or cholesterol levels, for instance, require you to...
A blood test is the only way to measure cholesterol. High cholesterol levels in the blood lead to heart disease. More than 102 million American adults have high cholesterol, according to the Centers for Disease Control and Prevention. More than 35...
Magnesium is a mineral needed in the body by every organ. Magnesium also contributes to the structural integrity of teeth and bones. Usually a person can get enough magnesium in their diet by eating foods such as whole grains, nuts and green leafy...
Knowing your cholesterol level is a valuable tool for taking care of yourself. The American Heart Association (AHA) says that adults over 20 should have a fasting cholesterol profile every 5 years. The AHA also recommends that adults keep their...
The body requires some amount of cholesterol to function properly, but high amounts of total cholesterol may increase your risk for complications such as heart attacks and strokes, explains MedlinePlus. High cholesterol may indicate you need to...
There are two primary ways to diagnose diabetes. Learn how doctors use fasting blood sugar and glucose tolerance test to diagnose diabetes in this free video from a nutritionist specializing in diabetic diets.
Juvenile diabetes is abnormally high blood sugar and a form of disordered metabolism in young adults. Get expert tips and advice on preventing, diagnosing, and treating juvenile diabetes in this video.
