Vitamin B12 - where in the range should it be?

This is something I haven't properly explored before. Had a full blood count test done at the GP surgery last week and got the result online via the surgery website. I usually copy and paste the results into a Word doc and keep them in a folder which I did last week, but apart from looking at my thyroid tests, HBA1C and cholesterol levels, I didn't study it properly. Just taken a look and my B12 level is shown as:-

Serum vitamin B12 level885 ng/L [150 - 99,999]

Given the top end of the range is massive, it makes it look as though my B12 level is possibly a bit on the low side?

[SeasideSusie Remembering]

That's a rather silly top end of range, I've absolutely no idea what it's supposed to mean. I don't believe your B12 level is low at all, I think it's good.

An extract from the book, "Could it be B12?" by Sally M. Pacholok:

"We believe that the 'normal' serum B12 threshold needs to be raised from 200 pg/ml to at least 450 pg/ml because deficiencies begin to appear in the cerebrospinal fluid below 550".

"For brain and nervous system health and prevention of disease in older adults, serum B12 levels should be maintained near or above 1000 pg/ml."

Ng/L is the same as pg/ml.

[Hidden in reply to SeasideSusie]

Thanks Susie. I've no idea what that range is about either, but the figures are copied directly from the surgery website along with all my other results.

I have looked up B12 deficiency symptoms and I don't really match up with those. So no need to supplement really then?

[SeasideSusie Remembering in reply to Hidden]

No, I wouldn't supplement if that is your normal level without supplementing. I supplement because mine was lower, I managed to increase to a good level and now use B12 a couple of times a week to maintain my level.

[Hidden in reply to SeasideSusie]

Thank you Susie, that's one less supplement to take, thank goodness. Got quite a cocktail on the go which I've been using for some time