Hi mrsD, thanks so much for your very quick response!

Well, I probably have more research to do before deciding on a beginning methylfolate dosage. I read through some of the articles on mthfr.net, and one of particular interest to me was an article on methylfolate side effects:

http://mthfr.net/methylfolate-side-effects/2012/03/01/

From what was said, it seems that it may be a good idea to start at a low dose, monitor results, then gradually increase to the 800 mcg level.

I would be interested in hearing the experiences of other people on the board who have supplemented with both methylfolate and methylcobalamin – dosages, benefits, side effects? Thanks in advance to anyone who responds!