Thyroid UK
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Ferritin, folate, B12 and D3

Hi so here are the results of ferritin, folate, B12 and D3. Any advice on supplementation would be welcome.

Ferritin - 15 (15 - 150 premenopausal females, 30-400 postmenopausal females)

Folate - 3.1 (4.6 - 18.7)

Vitamin B12 - 204 (190 - 900)

Total 25 OH vitamin D - 47.3 (25 - 50 vitamin D deficiency. Supplementation is indicated)

Thank you

2 Replies

Marie_C You need to speak to your GP about your Ferritin level. Ask him to do a full iron panel to see if anything else is going on. You may need an iron infusion. If you are prescribed iron tablets then take each one with 1000mg Vit C to aid absorption and help prevent constipation. Take iron 4 hours away from thyroid meds.

Eating liver once a week can help raise ferritin level but is not the sole answer in your case as your level is dire.

Folate - 3.1 (4.6 - 18.7)

Vitamin B12 - 204 (190 - 900)

Again, speak to your GP about B12 and folate. They work together and your folate is well under range and your B12 very low.

NHS info -

NICE guidelines -

Pop over to the Pernicious Anaemia Society forum here on Health Unlocked for further advice. You may need to be tested for Pernicious Anaemia. You may need B12 injections. Don't supplement for B12 or Folate until you've taken advice and been tested.

Vit D is deficient. You can buy some D3 5000iu and take 1 daily throughout the winter then retest in the spring. When you've reached the recommended level of 100-150nmol/L reduce to 5000iu alternate days as a maintenance dose.

When taking D3 we also need it's important co-factors, see here -

Vit D aids absorption of calcium from food and K2-MK7 directs it to bones and teeth rather than arteries and soft tissues. D3 and K2 are fat soluble so should be taken with the fattiest meal of the day.

You can get D3/K2 combo supplements or single ones. Take D3 4 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 -


eat liver to raise ferritin

eat more green leafy salads and veg to raise folate

take methylcobalamin b12 and compound vit b Jarrows or Solgar


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