B12 serotonin dopamine

Last updated: March 13, 2026 Quick Answer: Vitamin B12 plays a direct role in the production of serotonin and dopamine — the neurotransmitters that regulate mood, anxiety, and emotional stability. When B12 levels are low, those chemical pathways can become disrupted, contributing to feelings of irritability, low mood, and heightened anxiety. A B12 injection for…