I was making the same mistake also ,before my doctor ran a blood cortisol test (morning and evening) every time I took b vitamins or b complex I would feel very depressed or anxiety or both at the same time the following day ,I found out that my cortisol levels were very high already,and some b vitamins especialy b-5 ( pantothenic acid ) and b-6 in higher doses can elevate your cortisol levels even higher and make you feel worst , centum ( mens) multi-vitamin has the amount proper amount of b vitamins that my body can hadle without making me feel bad the next day (good luck and I hope this info helps out)