as a test of the significance of previously described biochemical abnormalities in thiamine-dependent enzymes in brains and other tissues in patients with alzheimer 's disease , a double-blind , placebo-controlled , crossover , outpatient pilot study compared the effects of 3 g/d of oral thiamine hydrochloride for three months with those of a niacinamide placebo .
C0039840
thiamine
C0770309
thiamine hydrochloride