Hello all, I just wanted to ask if any of you that is doing thiamine megadosing were using benfotiamine and how was their reaction to it? I've started five days ago with thiamine HCL 1.8g and on the first day, I felt very energetic. To the point that I went running in the evening and did my best time for a 5km run (with 25% of the training in zone 5 and 65% in zone 4!). Everything changed when two days ago I've started benfotiamine 600mg (+1.2g HCL) and 1200mg (+0.6g HCL) the day after. All of a sudden, depressive mood, anxiety, pain in the back after the first day of "benfo". The reason why I started megadosing is that I wanted to try something for my very mild fibromyalgia-like symptoms that I'm having for a few years: mild depression, occasional back pains (which appear and disappear suddenly), brain fog, and irritability. I'm taking 300mg of magnesium (citrate) with 450mg of potassium (also citrate) and 600mg of NAC, and also occasional vitamin C. Should I quit "benfo" for now or, because it is more bioavailable, reduce uptake? Even a minimal dose of "benfo" (300mg pill) is giving me a depressive mood. Or maybe should I just continue taking it and just cope with the paradoxical side effects?