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Find out more about Kaiser Permanente Southern Alameda County's Laboratory Department, get our Fasting Instructions for Chemistry Tests and its qualified, caring doctors.
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 don't eat or drink anything except water. Don't wait until the day of your blood draw to ask if you should fast.
6 Jul 2016 Fasting means you don't eat or drink anything but water usually for 8 to 12 hours beforehand. So, if your appointment is at 8 a.m. and you're told to fast for 8 hours, only water is okay after midnight. If it's a 12-hour fast, avoid food and drink after 8 p.m. the night before.

Many people know they have to fast before a blood test, but they do not know why they should be fasting for blood tests. Not all tests require it, so it is a good idea to ask your doctor to confirm if you should fast before the test. Fasting is important because what you eat may change test results. There will be a change in your
23 Aug 2017 Some recent guidelines suggest that fasting is not necessary before all cholesterol and triglyceride tests. However, people who are having these tests should refrain from drinking alcohol for 24 hours before the test. It is always best for individuals to check with their doctor to see whether these new
Should I fast prior to lab work? If your doctor orders lab work, ask if you should fast before having the lab work done. Fasting is needed for some lab tests because certain test values change following the digestion of food. The measurements of blood sugar (glucose) and some blood lipids (fats and cholesterol) are common
The healthcare professional who arranges your blood test will tell you whether there are any specific instructions you need to follow. You can eat and drink as normal But if you're having a "fasting blood test", you will be told not to eat or drink anything (other than water) beforehand. You may also be told not to smoke
Your Doctor has referred you to have a 'fasting' blood test. To ensure reliable and accurate test results, it is important that you follow these instructions carefully. 1. Please ensure that you have nothing to eat or drink (other than water) for 8-12 hours prior to presenting for the test. It is recommended that you fast for 8 hours for
22 Mar 2017 Here's what you need to know about fasting before a blood test, including how long to fast for and if you can drink coffee. Your doctor will advise you how to prepare for each test. Fasting is usually safe if you're pregnant, provided you're in good health and aren't having a high-risk pregnancy. For your

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March 2018