Basic or comprehensive metabolic tests: Tests for blood sugar, electrolyte balance, and kidney function. Typically, people will be asked to fast for 10 to 12 hours before having one of these tests.
Which blood work tests require fasting?
Blood tests that you will likely need to fast for include:
- blood glucose test.
- liver function test.
- cholesterol test.
- triglyceride level test.
- high-density lipoprotein (HDL) level test.
- low-density lipoprotein (LDL) level test.
- basic metabolic panel.
- renal function panel.
What is included in a basic metabolic panel?
This panel measures the blood levels of blood urea nitrogen (BUN), calcium, carbon dioxide, chloride, creatinine, glucose, potassium, and sodium. You may be asked to stop eating and drinking for 10 to 12 hours before you have this blood test.
What happens if you don’t fast before a blood test?
What happens if I don’t fast before a blood test? If you don’t fast before a test that requires it, the results may not be accurate. If you forget and eat or drink something, call your doctor or lab and ask if the test can still be done. They can then tell you if you need to reschedule your test.
Can I drink coffee before metabolic panel?
When fasting for blood tests, you may still drink water, plain coffee, or black tea. Take your regular medications unless you are specifically told to take them only with food.
Can you brush your teeth when fasting for blood work?
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 DOES NOT fasting affect your cholesterol test?
The truth is, your cholesterol can be tested without fasting. In the past, experts believed fasting ahead of time produces the most accurate results. This is because your low-density lipoproteins (LDL) — also known as “bad” cholesterol — may be affected by what you’ve recently eaten.
Why do a CBC blood test?
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 you check your potassium level at home?
Professor Fiona Karet, co-founder of Kalium and professor of nephrology at the University of Cambridge said: “Currently, there is no medically approved, accurate blood potassium test available for use outside of hospital or centralised lab settings.
What are the normal lab values for the basic metabolic panel?
- BUN: 6 to 20 mg/dL (2.14 to 7.14 mmol/L)
- CO2 (carbon dioxide): 23 to 29 mmol/L.
- Creatinine: 0.8 to 1.2 mg/dL (70.72 to 106.08 micromol/L)
- Glucose: 64 to 100 mg/dL (3.55 to 5.55 mmol/L)
- Serum chloride: 96 to 106 mmol/L.
- Serum potassium: 3.7 to 5.2 mEq/L (3.7 to 5.2 mmol/L)
Are cholesterol tests affected by food eaten the day before?
Fasting for 10 to 12 hours before a cholesterol test ensures that a single food or meal does not affect the outcome of the test. However, if you ate a cheeseburger every day, that probably would affect your numbers. Cholesterol levels are affected by what you eat over time.
Is 6 hours enough for fasting blood work?
A fasting blood test requires you to avoid eating or drinking anything for some time before your test. The amount of time to fast varies for different tests. It’s generally in the range of 8 to 12 hours.
Can you chew gum while fasting for a blood test?
If it’s a 12-hour fast, avoid food and drink after 8 p.m. the night before. You also shouldn’t smoke, chew gum (even sugarless), or exercise. These things can rev up your digestion, and that can affect your results.
Can you drink black coffee when fasting for glucose test?
Q: Can I drink black coffee before a fasting glucose blood test? A: No, do not drink coffee, even if it is black. You can only drink plain water so do not drink coffee, tea, or anything else before a fasting blood test, even if it is diet/unsweetened.
Can I drink coffee with creamer while fasting?
As for having coffee or tea during your fast — you should be just fine. As a general rule of thumb, if you drink something with less than 50 calories, then your body will remain in the fasted state. So, your coffee with a splash of milk or cream is just fine. Tea should be no problem either.
What happens if I fast longer than 12 hours before blood test?
Many other fasting patients attend early, so you may experience some delays. Unfortunately it’s not possible to make appointments. IF YOU FAST LONGER THAN 16 HOURS – YOUR RESULTS MAY NOT BE ACCURATE, OR WE MAY NOT BE ABLE TO PERFORM SOME OF THE TESTS.