--is take the sublingual B12 apart from any other supplements and apart from food by a couple of hours or so; it is very easy to interfere with passive absorption of the cobalamin molecule, which is the largest molecule our bodies regularly process.

I would think if you were taking methylated folate you would not need to take other folate, and thus avoid the problem you mention. Mrs. D will hopefully chime in on this next time she's able to get on-line.