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

https://arthurcfxo449.weebly.com/blog/vitamin-b12-your-ally-in-combating-fatigue-and-boosting-stamina

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