Your doctor may ask you to take a fasting blood test to determine your cholesterol or blood sugar levels.
Although eating food or consuming drinks containing nutrients, calories or sugar will affect the results of your fasting blood test, drinking water will have no measurable impact because it contains no calories, fats or sugars. If you are dehydrated when the nurse or physician performs your fasting blood test, it can be difficult for them to draw blood from your veins. Dehydration can also affect your triglyceride count, which is one part of the lipid panel that doctors test along with your cholesterol by means of a fasting lab.
A blood sugar levels chart can show you at a glance where your current blood sugar puts you on the range of possible normal and abnormal values. This blood test, measuring the amount of glucose, is used to screen healthy people for early signs of diabetes during a routine physical exam.

It is advised for pregnant women, people over age 50 and for those at high risk for diabetes. You shouldn’t eat any food or drink anything other than water within eight hours of your test. The process of fasting ensures that the results of your blood test will not be confused by foods that you have eaten during the last few hours that your body has not fully absorbed. It is a good idea to drink water before your lipid panel fasting blood test in order to reduce the risk of a deceptively high triglyceride reading due to dehydration. After an overnight fast when you have not eaten for 8-12 hours is a basic way, but then you also need to test blood sugar after eating, typically about 2 hours after eating, to see how high the blood sugar went.
He or she will discuss steps you can take to lower your glucose levels and whether or not medication is necessary.

You should not eat food, drink coffee or take some medications for eight to 12 hours before a fasting blood test, but most physicians agree that you can drink water. Finally, doctors may have you do a test called an oral glucose tolerance test in which they give you a standard sweet drink in the clinical laboratory and take several blood samples before and after to see how your body handles a standard amount of pure sugar intake. Blood glucose may also be tested in emergencies to determine whether a low or high glucose level is responsible for unconsciousness.

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    Being replaced, there has to come a point where the sugar readings.

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  2. 21.09.2014 at 12:58:18

    Amount of sugar or glucose present in your blood stream algorithm, the level.

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  3. 21.09.2014 at 14:18:28

    What you feel when tell you at your.

    Author: KAROL_CAT
  4. 21.09.2014 at 14:10:51

    Patient is said to have diabetes include the use of hypoglycemic medications 4 , inadequate.

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  5. 21.09.2014 at 16:13:53

    Pump but after a severe low blood sugar may also be offered extra ultrasounds to check.

    Author: PRINC_OF_LOVE