I'm just about to finish my bottle of Folapro and have finally run out of my "glass bottle" of Jarrow MB12. I can say that on my latest run of SMP I did NOT have the "brightening" I had the other times where I felt super good for at least a few days. Today I actualy felt very wired and agitated. I decided to take 200 mcg of Jarrow MethylFolate (QuatraFolic) with some Enzymatic MB12 and felt much better immediately. I also have a bottle (unopened) of Solgr Metafolin at the house. So my question is of the various forms why would the L-5-MTHF perhaps not be as effective for me as the (6S)-5-methyltetrahydrofolic acid (Jarrow) and possibly L-methylfolate-Metafolin (Solgar). http://mthfr.net/l-methylfolate-methylfolate-5-mthf/2012/04/05/ seems to think the %L_MTHF == the 6S_L_MTHF Maybe the potency of my Folapro is questionable. Is it possible my body wants the (6S)-5-methyltetrahydrofolic acid preferably?