10 Things You Need to Know About B12

9. Regulates Your Mood

B12 plays a role in nerve growth and brain cells, so it makes sense that it is linked to mood regulation. The vitamin helps produces brain chemicals responsible for improved mood, which may help treat depression, stress, and anxiety disorders. One of the symptoms of B12 deficiency is mood swings, and research shows many people with clinical depression are deficient in the vitamin. Supplementation can help balance hormones and restabilize neuron function. A nourished brain is more likely to feel positive emotions than a malnourished one.