3 ms·

All I take is 2000mg of B12 twice a (work) day which does seem to help in concentration.

• meowface 12y ago
  The issue is that especially with metrics as flexible as "concentration" or "focus" (which in some cases can be controlled entirely by your mood, location, or your own willful intent), the placebo effect can be very powerful. Keep taking them, because it's probably not hurting, but it's difficult to know if it is empirically affecting your concentration outside of the placebo effect.
• ajays 12y ago
  Are you sure it's 2000mg, and not 2000mcg? There's a 3 orders of magnitude difference!