9 to 12 hours.
if you have been fasting and still your blood work report has high cholesterol level in it it means that you are at a high risk of high cholesterol which can give rise to heart disease blockages and heart attacks your doctor will inform you what time your blood test is scheduled whether to fast and if so how long you must fast beforehand generally between eight and 12 hours prepare for a water only fast by eating a nutritious meal prior to the fasting period the starving time varies in accordance to the specific approach for which the blood work is being performed in general the fasting period for blood test is 8 hours and the maximum duration does not exceed 12 hours during the starving time a candidate can drink water to reduce hunger pangs also according to the main approach for blood test certain beverages and current medications are allowed during fasting it depends on the type of blood test for fasting sugar tests it can have an affect fasting longer than 12 to 14 hours will cause your body to start utilizing glycogen th at is primarily stored in your muscles and that can affect blood tests the time frame can range anywhere from 9 to 12 hours before the blood test one of the fasting requirements for blood work is that you make a note of what you have been consuming for about a week prior to your blood work it is advisable to avoid red meat eggs and any food with high cholesterol in it fasting for the psa blood test why it is done and how long to do it written by leigh a zaykoski edited by donna cosmato updated 3 24 2009 the fasting psa blood test is a lab test used to screen men for prostate cancer in some cases you re not required to avoid coffee when you re fasting be honest when you go for your blood cholesterol test if you were required to fast for 12 hours and you only fasted for 8 hours because you had a snack before bedtime let the lab know check with your doctor or the lab where you ll be having blood drawn to find out how long you re required to fast sometimes this time frame is 6 to 8 hours and sometimes you might have to fast overnight in some cases you ll have to fast for up to 12 hours
http://www.buzzle.com/articles/fasting-for-blood-work.html http://www.livestrong.com/article/492574-can-i-have-coffee-if-im-fasting-before-blood-work/ http://www.buzzle.com/articles/how-long-to-fast-before-a-blood-test.html http://www.answers.com/Q/How_long_do_you_fast_for_a_fasting_glucose_blood_test http://www.buzzle.com/articles/fasting-for-blood-work.html http://www.healthguideinfo.com/other-cancers/p29877/ http://www.ehow.com/how_2127105_fast-before-blood-cholesterol-test.html http://www.ehow.com/how_2127105_fast-before-blood-cholesterol-test.html
how long to fast for blood work