B12 test timing

[Sparklyjenson]

Hi,

Does it matter what time of day you have tests for b12/mma/iFab?

Thanks

[Gambit62 Administrator]

Time of day shouldn't matter for any of those tests

[Sparklyjenson in reply to Gambit62]

Thank you

[Cherylclaire Forum Support]

I had six MMA blood tests over a three year time-span, all taken at different times of day, all raised - except for the final one in 2019, by which time, I had been self-injecting every other day for nearly two years.

So have to assume that, since most were done at haematology appointments, that it doesn't make any difference.

I also believe that the frequency of B12 was what finally reduced my MMA level.

IFab was taken a couple of times and was negative. Homocysteine normal.

Plenty of other tests over years (from 2016 onwards) but no diagnosis of PA or anything else.

Initially, B12 was below range- so B12 injections given, folate and ferritin were low within range so a three month course of tablets for both, and vitamin D given on prescription when osteoporosis of the spine was found.

I hope you have a good GP who will support you through this. In the end, this matters more than getting the label. Although I'd still like to know, I am satisfied that everything possible has been done. At least once !

[EiCa]

I have a lot of blood work done for various things. At times, I have found huge discrepancies (some alarming results). when a repeat test was done because of the discrepancy, it is usually normal. I finally figured out that for me, at least, getting the blood work at the same time of day, fasting at least 8-12 hours prior to blood work, removes variables that can cause these way different readings. I often look up if I should fast before a test or not, and get different answers, so I just do it. I feel I am comparing apples to apples then. Twice in the last couple of years, I had some alarming results, and they were both done in the middle of the day, ordered in the office by my doctor. Now I get an order for the blood work and do it fasting, at the same time of day. I have also found that if I ask practitioners if I need to fast or not before a test, I get different answers.

[Sparklyjenson in reply to EiCa]

Hi,When you had really different blood test results were they b12 related?

[EiCa in reply to EiCa]

No. They were blood sugar, cholesterol and kidney- related. Those are the few I remember.