Best Super B12 Liquid Sublingual Vitamin Supplement (60 Serving)

What the brand says

Ceretropic combined benefits of both methylcobalamin and hydroxocobalamin into one sublingual formula. Regular cyanocobalamin must have a methyl group donated to it before it can be used by the brain mitochondria. By supplementing the already methylated form, your body has more methyl groups for other parts of the methylation cycle. Hydroxocobalamin is the most bioactive form of B12. It is fast acting, reaches the brain in higher concentrations, and also binds to cyanide, allowing it to be eliminated from the body.