I think the methylation would only occur with the methylB12 with mercury grabbing the methyl group and turning itself organic.

About 2 months ago I bought a skin gel that containec and organic form of niacin - 1-methylnicotinamide and just after putting it on my skin I got instant mercury reaction, getting hot plus brain redistribution.

I also remember not feeling well when taking MB12 1000ug a year ago but the thing doesn't have to be the same with plain B12.

James - does that vitamin b complex also include b12 ; what form and how much?