Hi all - I spoke to a Dr today about when to get my B12, folate and ferritin re-tested. She said, given I am on an iron supplement, my ferritin levels should be tested in 4 months but that B12 isn't usually re-tested until 6 months post-loading injections. Is this accurate in your experience?
She also said it wasn't possible to request the specific blood test that distinguishes active from inactive B12...but knowing how vague and potentially inaccurate the total serum B12 level test is, this seems crazy to me? Do I really not have the right to request this particular test or is she just trying to fob me off again? (I'm in the UK, incidentally).
Still feeling pretty foggy and listless with my head feeling like it weighs a tonne most days. Dr said I probably won't feel better until at least 6-8 weeks after loading doses/starting iron tablets. Hope she's telling the truth!
Written by
Gilly27
To view profiles and participate in discussions please or .
Hi again! I had 5 shots over two weeks and they finished last Wednesday. My follow up injections are scheduled for every 3 months - so I would have had one top-up before getting retested (just before my 2nd top-up, I believe).
My folate level was 5.3 (3.10-20.5) so at the lower end of normal.
Hi Gilly27 if you are still suffering neurological symptoms then your loading doses should have continued "until there is no further improvement" according to both the N.I.C.E and B.N.F. guidelines on treatment for B12 deficiency.
Hi CliveAlive, sorry for the long delay- life got the better of me for a while!
I spoke to my GP about possible neurological problems I've been having including memory issues (primarily with names and words but also details of past events etc) and irritability/depression (I've been on the highest dose of Citalopram for years) but my concerns were completely disregarded. They really don't like the idea of more frequent injections do they!
I'm now hoping that I will somehow be able to get the MMA and homocysteine test (either with or without the Active B12 test) to better understand my current situation. I'm going to wait 3 months after my first top-up injection and then request these tests (or go private if necessary).
As to the cause of the B12 deficiency and low iron, I honestly haven't a clue! I am not a vegetation by any means and both the parietal cell and intrinsic factor tests came back normal. As did the Coeliac test. I don't take any medications that would suppress B12 as far as I'm aware - except maybe the combined pill. But would that account for my relatively low iron? I don't know..I'd really like some more investigation into the cause of the deficiency, I can only hope that my GP will eventually refer me if I bring it up enough..
Incidentally, I am currently supplementing B12 (injections), Iron (prescription tablets) and Folic Acid (OTC).
In a nutshell, yes. I do not feel better (yet). I want the active B12 test precisely because I am prepared for my total serum levels to be high. I want to know how much of that I can actually utilise. And, if it's not as high as predicted I can use that evidence as leverage to get more frequent injections or to be referred for further investigation as to the actual cause of the deficiency.
When supplemented, iron levels can quite easily increase to the point of toxicity so they are monitored as a matter of course - at least, according to every GP I've spoken to.
active B12 is unlikely to do anything but mirror the results of serum B12. It is not generally availabe on the NHS. Although it is measuring the B12 bound to the protein that passes into cells - rather than the protein that allows it to be stored in your liver - it is still only measuring the amounts of B12 in your blood and isn't providing a guide as to what is going on at the cell level - tests that can do this are MMA and homocysteine - both will be raised if B12 is low. homocysteine will also be raised if folate is low. MMA will be raised by other factors as well. Unfortunately neither test is currently generally available on the NHS.
"Hi again! I had 5 shots over two weeks and they finished last Wednesday. My follow up injections are scheduled for every 3 months"
The BNF (British National Formulary) is a book every UK GP will have access to..probably a copy sitting on their desk or bookshelf. It's also possible to get your own copy and a good library will have a copy in reference section. Relevant info is in Chapter 9 Section 1.2
BNF specifies 6 shots over two weeks not 5.....then injections every 3 months for B12 deficiency without neuro problems
If a patient has neuro problems then treatment is more intensive, injections every other days then once improvement has stopped it's a maintenance injection every 2 months
Have you got neurological symptoms? eg tingling, pins and needles, tinnitus, balance issues, memory problems plus many others
The fact that you have been given 5 shots not 6 makes me suspect that your surgery is following local area NHS B12 deficiency guidelines rather than BNF or BSH . Some of these local area B12 guidelines have not been updated for years.
Might be worth you trying to track down local B12 deficiency guidelines for your area/county.
These UK local B12 guidelines can be tracked down by
1) an internet search
2) search on local area NHS website, possibly under haematology guidelines/policies
3) FOI (Freedom of Information) request to local area NHS website
4) CCG may be able to tell what guidelines are being used in the area
Martyn Hooper's book "What You Need to Know About Pernicious Anaemia and Vitamin B12 Deficiency " mentions UK B12 treatment guidelines, I gave a copy of this to my GPs.
Unhappy with treatment?
Link about writing letters to Gps about B12 deficiency. Point 1 is about undertreatment of neurological symptoms.
You'd be better off knowing your ( RDW )blood cell width distribution , know that and then you can request to have your vitb12 more often if that is above or below range , it's surprising how the RDW plays a part in vitb12 😊 good luck
Content on HealthUnlocked does not replace the relationship between you and doctors or other healthcare professionals nor the advice you receive from them.
Never delay seeking advice or dialling emergency services because of something that you have read on HealthUnlocked.
B12 levels 6 months after loading injections
Repeat b12 blood test after 6 loading doses - desperately need help
Quick question linking ferritin, folate and B12
Low B12 levels, not sure why.
