Thank you, Valentijn, your choice looks excellent, though it is quite pricey.
Nanonug, I do not know, if I have any mutation as I have never been tested, but apparently I am doing better with B complex with metafolin than with B complex with folic acid. Thanx for the Methyl- Guard, I just ordered Thorne 5-MTHF 5mg to see whether it will make any difference, so next step could be Methyl-Guard.