Thyroid UK
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Hello I managed too get gp telephone consultation and gp has advised I reduce b12 s my levels have shot up very quickly from 173 too 665 in two or three months thanks jarrows so not sure how too move forward or when or what too take now? Plus my iron levels are confusing my hemoglobin is 147 and averages 140s for sometime but my ferritin is crazy low any ideas what that points too as I googled it and coliacs came up but The other way round low hemoglobin but normal ferritin any ideas people? GP is happy for me too take two caps of chelated iron a day 😊

5 Replies

Nettiboo, Your serum B12 is higher because you are supplementing methylcobalamin. 665 isn't high, PA Society recommend B12 is optimal at 1,000. You can't OD on methylcobalamin as it is water soluble and excess is excreted in urine.

Vegetarian diet can cause low serum ferritin so supplementing iron will be helpful.


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.


Thanks for this Clutter


So should I carry on with the 5000mcg or drop too 1000mcg I don't take everyday I alternate with m Thorne b complex thinking of changing to a brand which include inositol I'm going too start iron once it arrives. Can both tablets be taken at once in the morning


I would stick with the 5000 mcg - B12 is so important and what is measured in the blood test does NOT relate to what the body needs in the cells. Only 20% of any B12 results reach the cells where it is needed. This is because the B12 in the blood is both bound and unbound .....

I would think you can take the B12 and Iron together - as long as you keep the iron 4 hours away from Levo.

Sounds as if your GP needs to read up on B12 and how it works in the body :-) B12 needs to be above 500 to prevent neurological symptoms which if left untreated can become serious. To be on the safe side - keep levels high. Once you are treating B12D - testing is pointless - this is detailed in Guidelines issued to GP's.


May I follow you please Nettiboo as I'm the same as you, low ferittin but not low Hb? My GP said I need prescribed ferritin because the amount in 'over-the-counter' meds is too low.


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