Increasing your intake of Vitamin B-12 is beneficial to the health of your entire nervous system, prevents the onset of pernicious anemias, and is effective for general tiredness and well being even if you aren't B-12 deficient.   
SCS's supplement is a sublingual formula, derived from hydroxycobalamin, superior in bioavailability to cyanocobalamin.  It has been complexed with beta-cyclodextrin to increase further oral bioavailability and maximum absorption.