*A great vitamin combo I discovered through trial and error (and
   probably research) is b12, magnesium and zinc after workouts --
   well .. before going to bed rather.

   Now that I HAVEN'T worked out in about... err... 10 years [I can
   still push a car out of a ditch with one arm and steady body
   even with a crap back - had to do it 6 months ago while
   everybody else was struggling*tongue emoticon*] - I noticed a
   nice benefit to the combination... even just magnesium + zinc
   (standard amounts):

   It works like a tranquilizer. Mild. Anti-anxiety. I actually use
   it before going to the dentist.