When to retest B12/folate/ferritin levels post-supplementation?

Hi Gilly27 How many loading doses are scheduled and then what frequency? Do you know what your Folate level is?

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.

(B12 was 135, 187-883: Ferritin 22, 22-275)

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.

cks.nice.org.uk/anaemia-b12...

Click on the link above, then on "Scenario Management" and scroll down.

You might think to mention this to your nurse/doctor.

Also you Folate is on the low side and may need supplementing.

As for testing your B12 as Eaoz says there is little point whilst you are having injections - unless it comes out very low.

Do you have any idea of the cause of your deficiency? Diet, surgery, medications, other diseases etc?

Recommendations say that there is little to no point in measuring B12 if the patient is on a course of injections - because the values will be high.

The only reason to retest things like ferritin and folate is to ensure compliance. But that's irrelevant when the patient is having jabs done by the doctors.

Why do you feel the need for an active B12 test? It's unlikely to show anything useful. Especially being as you are being treated.

Do you feel the treatment regimen is not working?

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

Lists of B12 Deficiency Symptoms

pernicious-anaemia-society....

b12deficiency.info/signs-an...

b12d.org/admin/healthcheck/...

Link below has UK B12 treatment info

evidence.nhs.uk/formulary/b...

UK treatment info also in BSH Cobalamin and Folate Guidelines, about a quarter through document

b-s-h.org.uk/guidelines/gui...

Flowchart from BSH Cobalamin guidelines

stichtingb12tekort.nl/weten...

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

nhs.uk/servicedirectories/p...

5) Practice manager of GP surgery may be able to tell what b12 guidelines practice is using

6) If all else fails then MP may be able to help track them down

parliament.uk/mps-lords-and...

B12 book

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.

b12deficiency.info/b12-writ...

CAB

citizensadvice.org.uk/healt...

HDA patient care trust

UK charity that offers free second opinions on medical diagnoses and treatment.

hdapatientcaretrust.com/

B12 blog posts that may be of interest

b12deficiency.info/blog/

b12deficiency.info/blog/201...

b12deficiency.info/blog/201...

martynhooper.com/

I am not medically trained , just a person who has struggled to get a diagnosis.