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Doctor insights on: Drinking Water Before Fasting Blood Test

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Dr. Gurmukh Singh
Board Certified, Pathology
44 years in practice
96M people helped
1

1
Will drinking water with added electrolytes(smart water) effect a blood test that's being done to check thyroid levels. Told to fast before test.

Dr. Gurmukh Singh
Board Certified, Pathology
44 years in practice
96M people helped
Will drinking water with added electrolytes(smart water) effect a  blood test that's being done to check thyroid levels.  Told to fast before test.

No: Water with electrolytes will not affect thyroid blood tests. However, you are wasting your money on such water. Tap water is just as good if not better. ...Read more

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Dr. Tonga Nfor
Board Certified
11 years in practice
506K people helped
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Dr. Tonga Nfor
Board Certified
11 years in practice
506K people helped
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Drinking Water (Definition)

Drinking water has been processed to remove impurities and contaminants, and is ...Read more


Dr. Bernard Seif
Board Certified, Clinical Psychology
35 years in practice
6M people helped
2

2
I need help! I have a blood test on the 5th of Nov.I'm not a heavy smoker, 3 cigs a day. I have been taking a lot of cranberry pills and drinking water will that help somewhat? I really have to have this weight loss surgery on the 9th

Dr. Bernard Seif
Board Certified, Clinical Psychology
35 years in practice
6M people helped
I need help! I have a blood test on the 5th of Nov.I'm not a heavy smoker, 3 cigs a day. I have been taking a lot of cranberry pills and drinking water will that help somewhat? I really have to have this weight loss surgery on the 9th

Even 3 cigarettes: daily can be harmful. If the cranberry juice is sweetened it will be full of sugar and cause more harm than it is worth. Please get the blood test and follow doctor's orders, especially after the surgery or you won't be successful. If you cooperate you are much more likely to have a good outcome. Peace and good health. ...Read more

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Dr. Tonga Nfor
Board Certified
11 years in practice
506K people helped
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Dr. Tonga Nfor
Board Certified
11 years in practice
506K people helped
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Dr. Jacalyn Bishop
Board Certified, Pediatric Endocrinology
15 years in practice
13K people helped
3

3
Can i drink water before a fasting blood sugar test?

Dr. Jacalyn Bishop
Board Certified, Pediatric Endocrinology
15 years in practice
13K people helped
Can i drink water before a fasting blood sugar test?

Yes: Water has no carbohydrates (the part of food that causes a rise in blood sugar) so there is no reason you can't drink it before a blood sugar test. ...Read more

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Dr. Jack Rubin, M.d.
Board Certified, Nephrology and Dialysis
43 years in practice
4M people helped
4

4
When fasting for 12 hrs to do a blood test can u drink water ?

Dr. Jack Rubin, M.d.
Board Certified, Nephrology and Dialysis
43 years in practice
4M people helped
When fasting for 12 hrs to do a blood test can u drink water ?

Fasting Blood Test: Yes, you can drink water and eat no food for your test. ...Read more

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Dr. Tonga Nfor
Board Certified
11 years in practice
506K people helped
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Dr. Terri Washington
Board Certified, Endocrinology
11 years in practice
927K people helped
5

5
When fasting for metabolic blood test can I drink water?

Dr. Terri Washington
Board Certified, Endocrinology
11 years in practice
927K people helped

Yes: Plan water no lemon or additives can be taken before a fasting blood test. ...Read more

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Dr. Douglas Miller
Board Certified, Pathology
36 years in practice
1M people helped
6

6
Is it safe to drink water when you are fasting for a glucose blood test?

Dr. Douglas Miller
Board Certified, Pathology
36 years in practice
1M people helped
Is it safe to drink water when you are fasting for a glucose blood test?

Yes: Water is fine before a blood glucose test, but don't eat any food or drink other liquids which might falsely elevate the glucose level in the blood. ...Read more

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Dr. Claude Parola
Board Certified, Internal Medicine
35 years in practice
2M people helped
7

7
Is it okay to drink a little water before a blood test?

Dr. Claude Parola
Board Certified, Internal Medicine
35 years in practice
2M people helped
Is it okay to drink a little water before a blood test?

No problem: Yes, it is ok to drink a little water if thirsty. ...Read more

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Dr. Douglas Miller
Board Certified, Pathology
36 years in practice
1M people helped
8

8
I've got a glucose blood test tomorrow morning and have to fast 10 hours before and was wondering whether you can drink water?

Dr. Douglas Miller
Board Certified, Pathology
36 years in practice
1M people helped

Yes: Water is fine; nobody wants you to be dehydrated just for some blood tests, but they don't want you to take any food or other fluids which may elevate your blood sugar. ...Read more

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Dr. Nadeem Shaikh
Board Certified, Internal Medicine
26 years in practice
385K people helped
9
Dr. Bennett Werner
Board Certified, Cardiology
39 years in practice
63M people helped
10

10
I did blood test and creatine kinase was very high, i think more than 1000. I am going to the gym 4,5 days a week. Should i drink more water or?

Dr. Bennett Werner
Board Certified, Cardiology
39 years in practice
63M people helped
I did blood test and creatine kinase was very high, i think more than 1000. I am going to the gym 4,5 days a week. Should i drink more water or?

Normal: Strenuous muscular exercise elevates the CK - this is NOT abnormal. Drinking water is certainly a healthy thing to do when you're sweating, but it will not have any effect on your CK. Don't worry about it. (A CK of 10,000 would be significant) ...Read more

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Dr. Tonga Nfor
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11 years in practice
506K people helped
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