Methylcobalamin B12 is involved in the production of acetylcholine, a neurotransmitter essential for memory, learning

https://squareblogs.net/cwearsajde/the-link-between-vitamin-b12-and-thyroid-health-rvv3

Methylcobalamin B12 is involved in the production of acetylcholine, a neurotransmitter essential for memory, learning, and muscle function