Wendie Malick is 66 years old (birthdate: December 13, 1950).
What to know about fasting before your lab test. With certain blood tests, you may be instructed to fast for up to eight hours before your appointment. Fasting before a blood draw means you donât eat or drink anything except water. Donât wait until the day of your blood draw to ask if you should fast. That could cause your appointment to be rescheduled.
The best time. to test a blood sample for glucose for these. diagnostic purposes is after fasting (nothing to eat or. drink, except water) for at least 8 hours. It is. important to know the patientâs fasting status when. testing is performed in order to properly interpret. blood glucose results.