B vitamin complex

I found B vitamin supplementation to have rapidly diminishing returns. After all your liver stores something like a years worth of most of the B vitamins, so unless you are raging alcoholic or something similar, you really shouldn't have a deficiency.

I just save B vitamins for things like test days, interviews, being sick, etc. I haven't noticed an appreciable quality difference from cheap brands to more expensive ones, you'll be pissing out and excreting through your skin most of it anyway (as you'll soon notice from the smell).