Should i fast before a physical

Call us at or book online today. Instead, blood sugar issues often occur gradually, and you can even be prediabetic for years without knowing it. Keep reading to learn more.

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Join Today. For more questions about labs and blood work, email your primary care physician. Taking the right steps before testing helps ensure your results will be accurate. The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health. Fasting for a Blood Test. Why do I need to fast before my blood test? What types of blood tests require fasting? The most common types of tests that require fasting include: Glucose tests , which measure blood sugar.

One type of glucose test is called a glucose tolerance test. For this test you will need to fast for 8 hours before test. When you arrive at the lab or health care facility, you will: Have your blood tested Drink a special liquid containing glucose Have your blood re-tested one hour later, two hours later and possibly three hours later Glucose tests are used to diagnose diabetes.

Lipid tests , which measure triglycerides , a type of fat found in the bloodstream, and cholesterol , waxy, fat-like substance found in your blood and every cell of your body. How long do I have to fast before the test?

These include:. Before a person decides to fast, they should speak with a doctor to find out whether they should fast, and if so, for how long. If the test does require fasting, following the steps above can help an individual who has been asked to fast for a blood test to do so safely. If fasting becomes too difficult and a person breaks the fast due to extreme hunger or thirst, they should contact the doctor to reschedule the blood test appointment.

People can receive the wrong diagnosis if their blood test results are inaccurate, leading to further health complications. This is why following best practices around fasting before blood tests is so important. Anemia is the most common blood disorder. The body does not have enough red blood cells and is unable to deliver enough oxygen around the body. MCHC levels are measured during a complete blood test to identify the amount of hemoglobin in a single blood cell.

High levels of MCHC can indicate a…. A BUN test measures how much urea nitrogen a person has in their blood. Urea nitrogen is produced when the body breaks down protein.

The liver…. Find out here about the differences and…. A variety of conditions and lifestyle factors can lead to a reduction in hemoglobin. Common causes include anemia, pregnancy, and thyroid conditions…. What to know about fasting before a blood test. Fasting length Why fasting is required Tips Things to avoid Conclusion Fasting before a blood test means that an individual should not eat or drink anything other than water before undergoing certain blood tests.