Hi, I need some help understanding my B12 results, my Doctor phoned me to say my B12 is elevated and to do another test on the 7 September, but I'm googling and it's frightening me.
But then I'm thinking if it was really bad I would be referred!
Thank you for your help in this matter.
Kind regards
fjh29
You posted this 3 months ago:
and B12 my levels are low so the Dr told me to buy vitamin tablets.
Have you been supplementing with B12 - if so how much - or a B Complex?
What was the result when doctor said B12 was low and told you to buy tablets?
289 The doctor has told me to stop talking B12 for 4 weeks then have another blood test.
My result now is 1427 if I'm reading my b12 results correct
Don't worry about it. It's not a problem having high B12 if it comes from tablets. Excess is excreted. 
Thank you for your reply.
Even though my B12 result is 1427? It's off the scale
Well, it is on that range, but ranges vary. Honestly, don't worry. Just stop taking it for a while and the level will come down. It's water-soluble, so you'll just pee out what your body doesn't need.
I get B12 injections every 2 months and when I last got a load of bloods taken mine was over 2000. The GP wasnt bothered although the lab did slap his wrist as its a pointless test when you're on injections. Its going to be very high, that's the point of the jabs.
Thank you for your reply, it's helped me to understand
fjh29
So it looks as though supplementing has done a good job. Drop off the B12 now and just continue with B Complex, that should hopefully maintain a good level. You should have been taking a B Complex with the B12 to keep all the B vitamins balanced.
Thank you for your help thank you so much
I'm hopeless, so if I start taking it again I need to B complex.
Thank you very much
As your serum B12 is now over 500 (or Active B12 level has reached 70), stop the B12 and just take a good quality daily vitamin B complex
If Vegetarian or vegan likely to need ongoing separate B12 few times a week
B12 range in U.K. is too wide
Interesting that in this research B12 below 400 is considered inadequate
healthunlocked.com/thyroidu...
supplementing a good quality daily vitamin B complex, one with folate in (not folic acid)
This can help keep all B vitamins in balance and will help maintain B12 levels too
Difference between folate and folic acid
healthline.com/nutrition/fo...
B vitamins best taken after breakfast
Thorne Basic B recommended vitamin B complex that contains folate, but they are large capsules. (You can tip powder out if can’t swallow capsule)
Thorne currently difficult to find at reasonable price, should be around £20-£25. iherb.com often have in stock. Or try ebay
Other options
healthunlocked.com/thyroidu....
IMPORTANT......If you are taking vitamin B complex, or any supplements containing biotin, remember to stop these 7 days before ALL BLOOD TESTS , as biotin can falsely affect test results
endo.confex.com/endo/2016en...
endocrinenews.endocrine.org...
In week before blood test, when you stop vitamin B complex, you might want to consider taking a separate folate supplement (eg Jarrow methyl folate 400mcg)
Post discussing how biotin can affect test results
healthunlocked.com/thyroidu...
Hairloss
You need Full iron Panel test for anaemia including ferritin
Has GP done this
Please add most recent results
Also what are your most recent Ft4 and Ft3 results
Thank you for your reply and information
Here is my B12 blood result
So your folate is dire at 4 (3.9-20)
Definitely need daily vitamin B complex
Ferritin is often high with Graves’ disease and/or post menopause
Your iron levels are fine
No vitamin D test result ?
Test twice yearly via NHS private testing service when supplementing
Thank you, no Vitamin D results I don't know why because this was requested by the Doctor, I will mention it when I have my next blood test.
Thank you for all your help.
They hate testing vitamin D
It’s relatively expensive and they avoid testing if at all possible and will only test once every 2 years
Oh, I didn't know this, I will ask my Doctor.
Thank you
Try to get GP to test initially
Just test via NHS private service going forward
So my folate is low?
Yes …..all but deficient
Just 0.1 point away from being deficient at bottom of range
But because it’s (just) within range …down to you to self supplement
Aim to maintain at top of range by taking daily vitamin B complex
Thank you for your help I will start to take Vitamin B complex.
I honestly didn’t know, I just thought taking B12 was all I needed.
NHS only tests for and treats vitamin deficiencies
With thyroid disease we need optimal vitamin levels
Down to us as individuals to maintain optimal vitamin levels
Vitamin D at least over 80nmol and between 100-125nmol may be better
Serum B12 at least over 500
Folate near top of range
Thank you for helping me understand I really appreciate.
B12 and Vitamin D
B12
B12 defficency advice 
Elevated TSH
B12 and Ferritin 
