Methylcobalamin B12 supports a healthy mood by participating in the production of neurotransmitters involved in feelings

https://www.scribd.com/document/766216085/What-You-Need-to-Know-about-the-Side-Effects-of-Vitamin-B12-Supplements-172714

Methylcobalamin B12 supports a healthy mood by participating in the production of neurotransmitters involved in feelings of happiness and well-being