Amazon has the 60-Count Life Extension B12 Elite Lozenges for $8.25 - 25% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel at any time) = $5.78 with free shipping on $25+ or with Prime.

These supplements have two B12 forms: adenosylcobalamin and methylcobalamin, that are essential for the healthy growth and replication of brain cells.