Yet, a randomized, double-blind, placebo-controlled trial in 215 men (35-55 years old) found that daily supplementation with B vitamins (at 3 to 13 times the current RDA, except for folic acid, which was included at a dose equivalent to the RDA), vitamin C (500 mg/day), zinc (10 mg/day), and magnesium (100 mg/day) for 33 days had no effect on measured performance of executive functions, including the Stroop color-word test, the peg-and-ball task, and the Wisconsin card-sorting task (134)
Supplement Regimens : Nutritional supplements like vitamin D or omega-3 fatty acids support overall health and brain function
J., Morgenstern, R., Mancini, J., Ford-Hutchinson, A
Simsir, A., Kizilay, F
Ning Y, Fang S, Zhang R, et al