Can you drink black coffee before a fasting blood test for cholesterol?
Acute coffee ingestion does not affect LDL cholesterol level. BACKGROUND: Although patients are instructed to abstain from food before having blood drawn for lipid analysis, many still drink coffee in the morning. It is unknown whether coffee consumed prior to drawing blood samples will impact fasting serum lipids.
Fasting Instructions. A water-only fast involves not eating or drinking anything but water, generally for eight to 12 hours prior to your blood draw. Unless you are given an exception, you should not eat any food during this time or drink hot or iced black coffee or tea, soda, juice, or any liquid but plain water.
- Drinking coffee and eating are OK before some blood tests but not others, and some doctors say any black coffee at all before is OK even before a cholesterol test as long as you don't add cream or sugar. Ask your doctor if you can drink coffee before a test.
- 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.
- It depends on the type of blood test you're having. You can eat and drink as normal before some blood tests. 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 before your test.
A fasting blood glucose test can diagnose diabetes. A fasting blood glucose test measures levels of sugar in the blood to see if they are healthy. It is important that a person has not had anything to eat or drink other than water for 8 to 10 hours before a fasting blood glucose test.
- However, if the test is drawn as part of a total lipid profile, it requires a 12-hour fast (no food or drink, except water). For the most accurate results, wait at least two months after a heart attack, surgery, infection, injury or pregnancy to check cholesterol levels.
- It is important that a person has not had anything to eat or drink other than water for 8 to 10 hours before a fasting blood glucose test. Fasting helps ensure that the blood test records an accurate measure of fasting blood sugar levels. The results help a doctor to diagnose or rule out diabetes.
- 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.
It depends on the type of blood test you're having. You can eat and drink as normal before some blood tests. 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 before your test.
- Fasting- no caloric intake. You can drink water and non-caloric beverages like black coffee. The benefit comes from not taking in any calories, not dehydrating yourself. I know some religious fasts prohibit drinking, like on Yom Kippur you're not even supposed to drink water during the fast.
- Blood glucose tests are either random or fasting tests. For a fasting blood glucose test, you can't eat or drink anything but water for eight hours before your test. Certain medications can affect blood glucose levels.
- Any person between 18 and 60 years, weighing 45 kg or more can safely donate one unit of blood, that is, 350 ml once every three months. After donation, the blood volume can be recovered within 24 hours and the haemoglobin count returns to normal within two weeks.
Updated: 21st October 2019