MTHFR Mutation

[azab]

my 11 yo son has (MTHFR_677 , MTRR_66 , MTR_2756 ) heterozygious mutations, the Doctor has discriped folic acid, but i have read that it is wrong to take folic acid in this case, i do not know what to do. He has normal MTHFR_1298, protein c 108%, protein s 106%, antithrombin III(AT-III)105%, factor v leiden 2.7

[mombojombo]

This sounds like the time in which a second opinion would be essential.  I think too when it is a situation like this, finding someone that is a national expert in it and consulting with them even if over phone or video call or email is a great idea.  What's happened since you wrote this?

[azab]

I just receive the results of B12 and folic acid of my son, who has high homocystin level (16 umol/l ) , folic acid ( 6.8 ng/ml ) and Vitamin B12 ( 350 pg/ml )  
He has iron deficiency anemia with iron 47 ug/dl and ferritin 9.9 ng/ml.
his weight is 45 kg.