I am also homocygous für MTHFS, but I did not find much info about that. Can You give me a link or info, please!? That's why we should be careful with vegs?? (vegs contining folic acid like beans and peas?) Violeta, yes I took a lot of chlorella in the last two years because of the metals. But without methylation I did not get out the toxic stuff of cells and brain where it combines with borrelia and viruses. Now I am still buzy with getting sulfur out of my body, before I try to continue with methyl-donors. I dicided to have supplemets tested with bioresonance now to get a clue when to take how much. And about B12 at the moment it gives the feedback: not to take at all! Inflammation issue got better meanwhile, taking quercetin, and also using a bioresonance programme regarding the th1/th2 shift.