Download FREE Practo app
Get ₹200 HealthCash
Vitamin B test
Hi Dr, i just had renerve plus injection when i went for loose stool issue. My question is, if i take a vitamin B blood test now, will that be valid result or should i have to wait for X days/weeks before checking the Vit B level?
Thanks
Answers (27)
If you would like to discuss your concern in more detail, please feel free to contact me on WhatsApp at eight six one nine six six nine nine zero six. Alternatively, you can connect with me through the Practo app for a detailed consultation
Answered
Let others know if this answer was helpful
Didn't find the answer you are looking for?
Talk to experienced doctor online and get your health questions answered in just 5 minutes.
If you would like to discuss your concern in more detail, please feel free to contact me on WhatsApp at nine one one nine two five five six nine nine. Alternatively, you can connect with me through the Practo app for a detailed consultation
Answered
Let others know if this answer was helpful
No, testing right after a Renerve Plus injection will not give you a true picture. That injection contains a large dose of B12, so your blood level will read high for several weeks regardless of your actual stores. Many people get labelled 'normal B12' this way and the real deficiency gets missed.
Next Steps
Wait at least 4 to 6 weeks after the last injection before checking serum B12 - and if the report has to be done sooner, ask for homocysteine instead, which is not affected the same way. Also do let your doctor know about the loose stools if they are still continuing, since long-standing diarrhoea itself can cause B12 and other deficiencies.
Answered
Let others know if this answer was helpful
I would like to know more detail about your concerns , why was the need for renerve plus injection and why did the loose stool occur.
As a general surgery resident i believe in treating the root cause
Next Steps
yep wait for atleast 1 whole month before u test again
Answered
Let others know if this answer was helpful
You should wait at least 1 to 2 weeks after taking a single dose of Renerve Plus (which contains a high 1500 mcg dose of methylcobalamin/vitamin B12) to get an accurate, unskewed blood test
Check your serum B12 levels and only after 2weeks since ur last renerve plus injection
Next Steps
feel free to consult me on practo for further evaluation and management
Answered
Let others know if this answer was helpful
Report just after i hection will show high b12, wait for at lest 2 - 4 weeks before investigation
Answered
Let others know if this answer was helpful
You may wait for at least 2 weeks before you do the vitamin b 12 level
Answered
Let others know if this answer was helpful
Hi, no, testing Vitamin B12 right after taking a Renerve Plus injection won't give an accurate result — the injected B12 will show up in your blood and falsely raise your reading, even if your actual body stores are low.
Next Steps
Please wait at least 3-4 weeks after the last injection before getting your Vitamin B blood test done, so the report reflects your true levels. If you've only taken one injection so far, do check with the prescribing doctor about how many total doses were planned, and coordinate testing timing accordingly.
Health Tips
If you're having ongoing loose stools, it's worth getting that separately evaluated too, as prolonged diarrhea itself can affect B12/nutrient absorption.
Answered
Let others know if this answer was helpful
Depends on what was your status of b12, how many inj.you took. If you have taken 5 then wait for 2 weeks before test.
Answered
Let others know if this answer was helpful
What was time duration you take injection
Please lets discuss case then i will give proper dose of vit b12 so your deficiency should be corrected
Answered
Let others know if this answer was helpful
When was the injection given?
What was your previous vitamin B12 levels?
Kindly consult…let’s discuss
Answered
Let others know if this answer was helpful
Articles you may like
Tell us what's troubling you
Disclaimer : The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding your medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.