Thyroid UK
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More blood test, advice on prescriptions given would be appreciated


Just got my results from retest GP wanted as follows:

Serum Ferritin level  84ng/ml (ferritin 20-100 cannot exclude iron deficiency with coexisting          chronic/inflammatory conditions)

Serum Folate level   3.4 ng/ml  <3ug/l suggest deficiency

Serum B12     212.8 ng/l (155.87 -1335.4) up from143.67 a three weeks previous

Intrinsic factor antibody  0.91 u/ml (0 - 1.19) negative.

I saw a locum GP yesterday who actually sat and listened and was very nice, however not sure what he has prescribed is the best. Should I stick with his scrip's or supplement with something different. I have already started Jarrows sub. 5000 B12 and D3 5000 with K2 included.

Colecalciferol 800unit capsules

150 capsule - 5 capsules daily

Cyanocobalamin 50microgram tablets

50 tablet - Take one twice a day

Folic acid 5mg tablets

28 tablet - Take one daily

Thank you for your time and help thus far


3 Replies


I can't see a vitamin D result so can't tell whether 4,000iu Colecaciferol is sufficient or 5,000iu is better.

5mg folic acid for 4 weeks lifted my folate from 3.1 to >8.0 and the prescription ceased.

I'd continue with 5,000mcg methylcobalamin and take a B Complex vitamin to keep the other B vits balanced.


I am not a medical professional and this information is not intended to be a substitute for medical guidance from your own doctor. Please check with your personal physician before applying any of these suggestions.


With the vitamin D your tablets are easier to take so I would take them. For some reason in some areas doctors are only allowed to and pharmacists only get 800IU tablets as it's the cheapest form which can be prescribed in different combinations to adults and children.

B12 again your one is better as you will definitely absorb it.  Again if it's shown you can absorb vitamin B12 they will prescribe you Cyanocobalamin as it's the cheapest form.

With the Folic acid it would be better for you to go and buy a B complex tablet which has some of the other B vitamins in it as well.

1 like

Thank you for your replies. I will stick to my jarrow b12  and take the folic acid for the month. Have no choice but to take my own d3 as believe it or not my pharmacy  (the biggest chain) haven't got it in stock!

Here's hoping with all these supplements I  soon feel more like me. Thank you for your support.


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