Yes Vit B12 and or folate def will cause high MCV, but with iron def MCV can be normal. I do not know what to advise, see a haematologist, find out why your iron is was low?
Testing iron and B12 without also testing folate is just stupid as all three can have an effect on MCV. As Marre has already said, low B12 and folate can cause a high MCV, low iron a low MCV. Unless you know the level of all three it is impossible to draw any conclusion.
We often talk about a high folate level masking the anaemia of a low B12 by making the MCV appear normal. Perhaps in your case the reverse is happening and your high B12 is masking a low folate. You will also not get the full benefit from the B12 without a decent level of folate as the two are interdependent.
Hi engels the tabs I WAS taking were High Strenght Vit B12 1000mcg. After I heard about the 2 forms of B12 I rang the company to ask which form theirs were and told the cyo not methyl one.
Hi....Take the iron every day and eventually you will feel better. It will take a few weeks.
After that keep an eye on your iron intake. I felt better after taking iron but after I finished the tablets my levels went back down and I felt ill again.
Mch/MCV is usually high with PA. Maybe someone else could reply re that part.
My serum B12 is 1207 so doc says that's good! After supplementing with cianocobalamin? I read an article saying if it's high then it can mean the liver isn't absorbing it and sends it back to the blood to discard it. Can't find that article now but I printed it and gave it to my doc, think he threw it in the bin. Will be interesting to see what the reading is after I swapped to methylcobalamin that is easily absorbed but that won't be for a long time as doc isn't interested!
Hi BrecklandRanger, I have found a link which may be of interest, posted in the response to BVLD hope it is of interest. Looking on your profile I see you are on Thyroid UK as well and seem to be on the same long haul road. Good researching.
Hi BrecklandRanger, I have found a link which may be of interest, posted in the response to BVLD hope it is of interest. Looking on your profile I see you are on Thyroid UK as well and seem to be on the same long haul road. Good researching.
Siskin, thank you for that interesting article. Due to this site I've learnt all I need to know and for me, taking methylcobalamin has done the trick. Within a week I felt normal! My deficiency is quite mild compared to others who have PA and have injections but at my worst I was experiencing little electric shocks in my head along with the macrocytosis ( that my doc wanted to blame alcohol for) Halleluyah I say!
Siskin, thank you for that interesting article. Due to this site I've learnt all I need to know and for me, taking methylcobalamin has done the trick. Within a week I felt normal! My deficiency is quite mild compared to others who have PA and have injections but at my worst I was experiencing little electric shocks in my head along with the macrocytosis ( that my doc wanted to blame alcohol for) Halleluyah I say!
Low MCV and MCH is usually due to iron deficiency. Not sure how long you have been taking iron supplements but it takes quite a few months for it to really kick in - red blood cells live for about 120 days so you have to wait until they are gradually replaced. Did you have a reading for MCHC? If that was also low that would confirm iron deficiency.
Hi helonlegs Have been taking iron supps for about 130 days. 1st bottle of tabs had about a hundred at a guess another 30 or so gone. No reading of MCHC but I think I can calculate when I get a moment of fog free brain. I saw the calc. on google and then promptly lost it. Ugh. Thank you for your help. Sorry I took so long to acknowledge your reply.
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