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You shouldn't. The caffeine in coffee actually changes your body's metabolism of fats and sugars. It stimulates the breakdown of stored body fat which is then released as sugar into the bloodstream. This can cause higher than normal levels of both sugar and triglycerides in the blood as compared to a normal fasting state.
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∙ 13y ago
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∙ 9y agoNo. When "fasting" for any reason, the only thing that is permitted (and check with your doctor, as blood work is different than, say, surgery) is water, and only to take medication (again, if permitted by your doctor)
A "fasting" status means nothing by mouth at all. This includes, of course, decaf coffee. If one doesn't fast the results of the lab tests could be completely wrong, and the doctor was under the impression that you were fasting.
If you accidentally or for some other reason don't fast, MAKE SURE you alert your doctor right away. This is for your own good, as important decisions about medication and procedures are made from this blood work.
Wiki User
∙ 6y agoYour Doctor should have given you a list of things you could not eat or drink. If you have not been told then it is safer just to stick to pure water. However if you are going for certain surgical procedures you need to abstain from both food and drink for a certain time beforehand as instructed.
Wiki User
∙ 14y agoNeither. Caffeine in both tea and coffee may affect glucose levels. Coffee may affect cholesterol levels.
Wiki User
∙ 13y agoDepends on your level of fasting.
Wiki User
∙ 12y agoNo way!
Wiki User
∙ 12y agoYes you can
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Can you drink black coffee before a blood test that does not requires fasting?
yes
Can I drink coffee before a fasting blood draw?
You should check with your doctor, but it should be ok to have black coffee with no sugar, cream or milk.
Can you drink black coffee before a fasting blood test for CMP or Lipid Profile?
fasting blood test means to take sample empty stomach. however a little water can be taken.
What can you eat or drink before a fasting blood test?
Water. Anything else will affect the glucose levels...including black coffee.
When someone is fasting before having blood work done can they have coffee or tea?
Yes as long as you drink it black....no sugar or cream/cream substitutes.
Can you drink coffee before a fasting blood test?
No. You can and should drink red bull before fasting labs. The diet red bull, of course. This is much better for you and will not affect the blood test.
Can you drink coffee with non diary creamer before blood test for cholesterol?
No you can't have anything. It is a fasting blood test.
Can you drink black coffee before blood work?
Do not drink it just in case
Can you drink black coffee before a blood test is done?
if u want black blood
What is acceptable to drink while fasting?
coffee
Can you drink black coffee before blood test that requires fasting?
Users have said:No seems to be the answer. My solution to this is to drink hot water from my coffee mug. It really helps your craving for coffee and hydrates you as well. No. The most common blood tests done that require fasting are lipids (cholesterol, LDL, HDL and Triglycerides) and fasting blood sugar (note, glycohemoglobin does not require fasting). Of these, the blood sugar and triglycerides are the most variable. They are affected mostly by sugar intake. It is very important to stay hydrated before a fasting blood test so that your blood and urine do not falsely indicate your kidneys are malfunctioning. Although water is best, caffeine has not significantly affected the blood tests of my patient population.Depends on the test, and if it's a fasting test, but Generally speaking no, caffeine affects liver function and releases hormones from your adrenal glands, even decaf has caffeine in it.No, if you ingest anything other than water the results will be inaccurate. Some people believe that black coffee will not have an affect on glucose, however the caffeine alone has an impact on the pancreas which in turn effects insulin, which effects glucose.I am going for a blood test tomorrow morning (consisting of a whole range of sub-tests including cholesterol, thyroid, etc.). My instructions were 12 hours of fasting including all solids and liquids BESIDES water as well as black coffee in the morning...so YES you may have BLACK coffee. Cream and sugar obviously affect results.No, just clear liquids. Hit up the tea if your desperate for caffeineGenerally, no. You should try to drink only water.It depends on the test your having done. If you drink black coffee, with no additives, you can still have fasting labs done. However, coffee will increase your blood pressure and affect some tests .... especially a CRP.Your paying for these tests. I would recommend no coffee 10-12 hours prior if your not sure. The best method is to call the laboratory.It is best if you were not to have anything to eat or drink before having bloodwork done or any test as such because the coffee might change the result of the test in some way, maybe water is fine though.Yes. You are only supposed to drink water.
Can you have skim milk before a blood test?
If you are having blood work done and are told to fast, then you can drink nothing but water. If it is non-fasting, then you can have coffee, but be sure to tell the person doing the blood work.
