Thyroid UK
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Vitamin Supplements for Hypothyroid

Could someone please recommend a good vitamin B12 + B9 supplement brand and recommended daily dose?

Just had blood test result for the following:

B12 359 ng/L [197.0 - 771.0]

Folate 2.1ug/L [3.9 - 25.0]

Ferritin 115 ug/L [13.0 - 150.0]

C 3.5 mg/L [0.0 - 5.0]

D 95 nmol/L [50.0 - 120.0]

Other info:

I'm on 100 mcg of T4 & 20 mcg of T3 and latest blood tests for these are:

T4 13.7 pmol/L [12.0 - 22.0]

T3 4.9 pmol/L [3.1 - 6.8]

TSH 0.86 mu/L [0.27 - 4.2]

(Blood was taken at 11am, fasting)

2 Replies


B12 359 ng/L [197.0 - 771.0]

Folate 2.1ug/L [3.9 - 25.0]

You are folate deficient, with a below range folate level you should be seeing your GP about that.

Check for signs of B12 deficiency here and if you have any you should post on the Pernicious Anaemia Society forum for further advice If not then you could self supplement with methylcobalamin sublingual lozenges 5000mcg to start then when the bottle is finished change to 1000mcg as a maintenance dose. We need a good B Complex to balance all the B vitamins when taking B12, look at Thorne Basic B, that contains 400mcg methylfolate. But you really need to see your GP about your folate deficiency.

1 like

Thanks Susie, I have an appointment with my GP but that's lie 7 weeks off! I'll see if I can make that earlier or request a phone call with him.


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