After discovering that thiamine (vitamin B1) deficiency might be a factor in my insomnia, fatigue, brain fog, and chocolate/sugar cravings, I began experimenting with different formulations of it. Starting with the usual drugstore stuff, I moved on to two Japanese concoctions and then for a grand finale I tried a series of IV treatments to the tune of $1,700, almost none of it covered by insurance, with promising if not miraculous results. Why thiamine? I initially tried thiamine after discovering it is involved in GABA production, an inhibitory neurotransmitter that's a big factor in sleep. Thiamine is also involved in carbohydrate metabolism -- converting food to energy -- and I figured out a long time ago that my infuriating chocolate/sugar cravings must be caused by my brain's inability to process…