For the study, researchers compared cholesterol testing results of 300,000 people from Denmark, Canada, and the U.S. In both the U.S. and Canada, fasting for eight hours before a test is required. In Denmark, however, it is not.
Patients who are scheduled for a lipid profile test should fast (except for water) for 12-14 hours before the blood sample is drawn. If the patient's cholesterol is to be fractionated, he or she also should avoid alcohol for 24 hours before the test. http://www.healthatoz.com/healthatoz/Ato...
Generally, before a lipid or a glucose tolerance test, youâll be told to fast for eight hours. However, your healthcare provider may advise you differently. Always follow his/her instructions to the letter.reaking Your Fast. As soon as youâve had your blood drawn, youâll probably want to eat and drink something. Itâs a good idea to bring along a snack so you can do so as soon as possible. Schedule your blood test for the early morning to minimize the length of time youâll have to go without food.