Thyroid UK
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What goes with what ?

As the title says what goes with what with regard to supplements. Is there a chart anywhere that puts the information clearly.I have read but can't remember where (foggy brain) that if you take certain vitamins or other supplements you need to take so and so to balance or support it. If there isn't one perhaps we can put one together with amounts and proper names?

Particularly interested in vitamin B12 as mine is only 311( sorry no range given) which doctor says is normal.

Hope you can help please.


8 Replies

List of vitamins/minerals.

B12 should be supplemented with sublingual (melt in mouth) B12 but it must be methylcobalamin (not cyanocobalamin) to bring your level up towards the top of the range. You cannot overdose with B12, excess is excreted in urine so there's not problem with taking it.

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Hi Shaws thanks for the link I hadn't seen that before.



I don't know of such a chart but it would be useful. If you supplement:

B12 should also be supplemented with a B Complex to keep other Bs balanced. B complex usually has the daily RDA of folic acid which is synergistic with B12.

VitD3 is synergistic with K2 and magnesium

Magnesium is synergistic with zinc (they should be taken together to keep balanced).

Iron should be taken with 500mg-1,000mg vitamin C to aid absorption. (Iron should be taken 4 hours away from Levothyroxine).

VitC also aids absorption of Levothyroxine.

ps B12 311 is low. Supplement 1,000mcg methlycobalamin sublingual lozenges, spray or patches. If you inroduce new supplements do so 1 new supplement per week as if you have any adverse reaction you'll be able to figure out the culprit.

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Thanks Clutter Can you suggest a good make of B12 and B vits?I found a good article on Pulse about B12 deficiency and that it links with thyroid-info hasn't filtered through to my Gp.

Do you know how quickly it works and if it is likely to affect dose of Armour thyroid? I have a suppressed Tsh and at top of range on T3 and T4,so don't want to go hyper!

regards Jill


Jill, Ask your GP to test B12 and folate before you supplement. If s/he refuses you can supplement 1,000mcg B12 as excess is excreted. If levels are low you should feel some benefit 6/8 weeks after supplementing. I've used BetterYou Boost spray and currently use Jarrows Formula. Both are good. I use a supermarket brand B complex.

Also ask for ferritin and vitamin D to be tested. I wouldn't supplement iron without knowing levels but it's safe to supplement 2,000iu vitD3 during Oct-Apr because ultraviolet light levels are too low to stimulate vitD in the UK. Again, if low, you should feel improvement 6/8 weeks after supplementing.

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Supplements should be taken 2 hours away from Armour except vitD3, iron, calcium and oestrogen which should be taken 4 hours away.

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This isn't exactly what you are asking but I found this chart at the website at the "links" section.....Drug Interactions.


Thanks for link - useful when given new medicine


If you check thyroid hormone, it gives some information regarding supplements.


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