Methylcobalamin B12 is a form of vitamin B12 that plays a crucial role in brain function

https://johnathanyazr.bloggersdelight.dk/2024/09/16/vitamin-b12-your-secret-weapon-for-improved-concentration-and-focus-3/

Methylcobalamin B12 is a form of vitamin B12 that plays a crucial role in brain function and the production of red blood cells