Thyroid UK
82,705 members97,739 posts

B12 blood test result. Can someone help to read this please?

Hi, I had my thyroid tested and it included this part of the B12. Can you help me understand this please? thanking you :)

Vitamin D (25 OH) 63 Deficient <25 nmol/L

Insufficient 25 - 50

Consider reducing dose >175

Vitamin B12 307 Deficient <140 pmol/L

Insufficient 140 - 250

Consider reducing dose >725

Serum Folate 22.25 8.83 - 60.8 nmol/L

2 Replies

Flowers14 Your B12 is too low. Anything under 500 can cause neurological problems. Recommended level is very top of the range, even 900-1000. You could supplement with Solgar sublingual methylcobalamin 5000mcg daily then when you've finished the bottle buy some 1000mcg and take 1 daily as a maintenance dose. Dissolve under the tongue for absorption directly into the bloodstream, don't chew or swallow as stomach acid destroys B12.

When taking B12, we also need a B Complex to balance the B vits. Thorne Basic B is a good one and contains 400mcg methylfolate which will help raise your ferritin level which should be half way through it's range, which is about 35.

Vit D is recommended to be 100-150nmol/L so you could do with supplementing. Vit D has important co-factors

With your level the easiest is a combo supplement such as

As D3 and K2 are fat soluble, take with the fattiest meal of the day, four hours away from thyroid meds.

Magnesium comes in different forms, check to see which would suit you best and as it's calming it's best taken in the evening, four hours away from thyroid meds


Hi I have vit B12 deficiency.I have injections for it. Yours is low as is your vit D. Very similar to me. Hope you get it sorted out .


You may also like...