A member asked:

Would drinking a bottle of water right before a cbc dilute my blood and lower the wbc and lymphocytes count? my wbc was 12.4 and lymphocytes were 3,931. thanks.

2 doctors weighed in across 2 answers
Dr. Silviu Pasniciuc answered

Specializes in Internal Medicine

No: Drinking a bottle of water before having a blood test will not dilute your blood. Your WBC was slightly elevated otherwise. Talk to the ordering doc about the meaning of your results.

Answered 7/8/2020

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Agree with Dr. P: Drinking a bottle of water before blood test will not materially alter the results. In fact you should make sure that you are well hydrated before a blood test. Have a healthy diet, exercise 30 minutes/day, drink plenty of water, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Get HPV vaccine. Wish you good health!

Answered 7/8/2020

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