Methylcobalamin B12 is involved in the production of SAM-e (S-adenosylmethionine)

https://writeablog.net/melvinleeo/a-comprehensive-overview-of-vitamin-b12-sources

Methylcobalamin B12 is involved in the production of SAM-e (S-adenosylmethionine), a compound that plays a vital role in mood regulation and joint health