I was just diagnosed with mthfr after a series of miscarriages. I have 1 copy of each meaning I do not have a good gene.I went to see a hematologist where he prescribed me baby aspirin because of the high levels of homocysteine which causes blood clotting and extra folic acid. I've read mixed information about the folic acid. Not quite sure what to beleive about it. I've been researching it as well. But you are right, someone with this mutation should not have vaccines or other toxins and medals because we are unable to clear it from our bodies.
I used to drink wine and always got super sick from it. I've discovered that I get sick because I am unable to clear the sulfates from my body.
Lots of interesting things to learn about this.