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How Long Do I Have To Fast I Am Anemic Will That Make Me More Anemic?

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Posted on Mon, 20 Jan 2025
Question: Hello. I have to have blood drawn for a CBC, Metabolic panel, Vitamin D, Iron and TIBC, Ferritin, and HBA1c tests. I am anemic will that make me more anemic? Also how long do I have to fast ? Is 8 hours enough ?
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Answered by Dr. Indranil Ghosh (3 hours later)
Brief Answer:
No it won't make it anemic

Detailed Answer:
Hi
Thanks for your query.

Blood drawing for sampling draws only a miniscule amount compared to total body blood, so it won't certainly make you more anemic.

If there's a lipid profile involved, we advise 12 hrs fasting but for others, 8 hrs should suffice.

Hope this helps.
Regards
Above answer was peer-reviewed by : Dr. Prasad
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Follow up: Dr. Indranil Ghosh (29 hours later)
thank you so much!
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Answered by Dr. Indranil Ghosh (2 hours later)
Brief Answer:
You are welcome

Detailed Answer:
regards
Note: Do you have more questions on diagnosis or treatment of blood disorders? Ask An Expert/ Specialist Now
Above answer was peer-reviewed by : Dr. Kampana
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Answered by
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Dr. Indranil Ghosh

Oncologist

Practicing since :2004

Answered : 1709 Questions

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How Long Do I Have To Fast I Am Anemic Will That Make Me More Anemic?

Brief Answer: No it won't make it anemic Detailed Answer: Hi Thanks for your query. Blood drawing for sampling draws only a miniscule amount compared to total body blood, so it won't certainly make you more anemic. If there's a lipid profile involved, we advise 12 hrs fasting but for others, 8 hrs should suffice. Hope this helps. Regards