Phlebotomist / Lab Technician

Hello can u tell me how fasting for Ramadan (no food or liquids for 16 hours) affect my blood work test if at all. And how soon after finishing the fast (i.e. 2 weeks after resuming a regular diet) will it go back to normal. Looking for results for:
•. CBC
· GLYCEMIA
· UREA
· CREATININE
· TGO
· TGP
· TP
· TPT
· HIV
· HBSAG
· HVC
· BHCG
· EXAMINATION OF URINE
· BLOOD TYPE
Also is there anything I can do while fasting to maintain health levels let me know as we eat a pre-dawn meal and eat after 8pm-4am
Thanks

Asked by Umm Habeebah about 8 years ago

Hi Umm,  Sorry it took so long to answer your question, I had a family emergency near the beginning of the year.  Ok, the short answer:  a physician would be the one to ask this question because the over all answer would likely depend on your situation, activity levels, age, history, etc.  The longer answer I will give is a generalization that could apply to anybody.  Most of the tests you listed (except for "glycemia" - perhaps you meant glycohemoglobin?) would not be affected by a 16 hour fast from food and drink.  In general, though, if you were severely dehydrated it is possible that your CBC could show a falsely elevated hemoglobin, meaning that if you are anemic, it could show that you are normal (as one example).  Your urine could possibly show a higher myoglobin (if I remember correctly), meaning you are dehydrated.  Overall, a 16 hour fast shouldn't affect lab results negatively.  As for questions about your health during and after the fast, you would have to consult with a physician.

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