how long are you supposed to FAST for "fasting bloodwork"??


Question:
is it 10 hrs or 12??

Answers:
To properly "fast", a patient should not have any food or drink, other than water, for 12 hours before the test is collected. For example, if the patient has his/her blood tests collected at 8:00 a.m., then the patient should not eat any food or drink after 8:00 p.m. the night before.

This does NOT mean the patient should not drink water. Water is acceptable! But please, no food, gum, coffee, etc., prior to the blood test. These foods can add things like sugar or caffeine to your system which can interfere with the testing of your blood.

Other Answers:
12 hours i guess

Whichever your doctor has instructed you. If you're not sure or can't remember, call and ask. It is important, depending on the test given, to "fast" for the required time or you could get "false results".

They always say to stop eating and drinking at midnight the night before.so I guess the time varies as to what time your labwork is done.

usuall;y nothing after midnight

12 hours

Ten hours is fine. You don't want to go into hypoglycemia.
Source(s):
EMT and having had fasting blood glucose level tests.



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