Can you eat or drink before a CBC blood test?
You can typically eat and drink normally before a CBC. However, your doctor may require that you fast for a specific amount of time before the test. That’s common if the blood sample will be used for additional testing. Your doctor will give you specific instructions.
Does fasting affect CBC results?
Conclusions: Food consumption impacts CBC results. To ensure the consistency, quality, and repeatability of CBC analysis, blood should be drawn from fasting patients.
What does a CBC blood test check for?
The complete blood count (CBC) is a group of tests that evaluate the cells that circulate in blood, including red blood cells (RBCs), white blood cells (WBCs), and platelets (PLTs). The CBC can evaluate your overall health and detect a variety of diseases and conditions, such as infections, anemia and leukemia.
Can I drink water when fasting for CBC?
Yes, you can drink water while fasting before a blood test—in fact, drinking plenty of water can help ensure that you receive accurate test results. Dehydration can affect certain blood tests such as cholesterol, electrolyte and BUN tests.
Does CBC need fasting?
You don’t need any special preparations for a complete blood count. If your health care provider has also ordered other blood tests, you may need to fast (not eat or drink) for several hours before the test.
Do I need to be fasting for CBC blood test?
Does a CBC show kidney problems?
[H3] Blood tests for diagnosing kidney disease Following are a variety of blood tests that help determine whether or not you have kidney disease: CBC – complete blood count of your red blood cells, white blood cells, and platelets—low CBC level can mean kidney function is reduced.
Can you brush teeth when fasting for blood test?
Fasting means that, with the exception of water, you refrain from eating or drinking for a minimum of 8 hours (10 to 12 hours is preferable) prior to the test. This means no coffee or tea beforehand, but taking your vitamins or medications is okay. Brushing your teeth or using mouthwash won’t influence the test.
How much water can you drink before a fasting blood test?
Fasting means you don’t eat or drink anything but water usually for 8 to 12 hours beforehand. If your appointment is at 8 a.m. and you’re told to fast for 8 hours, only water is OK after midnight. If it’s a 12-hour fast, avoid food and drink after 8 p.m. the night before.