Can you narrow it down to which specific B vitamin does it? If you really wanted to undertake a project, you could do a single blind study with placebo vs real

Can you narrow it down to which specific B vitamin does it? If you really wanted to undertake a project, you could do a single blind study with placebo vs real b vitamins and prove if they work (grind up real vitamins and press them back in a way they look like placebo, put them in 30 day packs, and ask a friend to label and mix them up). Then make your guess after several months.