Which deficiency is associated with depression?

Vitamin B12 deficiency is notably associated with depression due to its critical role in the production of neurotransmitters, such as serotonin and dopamine, which are essential for mood regulation. A lack of vitamin B12 can lead to neurological changes, mood disturbances, and cognitive impairment, all of which are linked to depressive symptoms. Deficiencies in vitamin B12 can also result in anemia, fatigues, and weakness, further impacting a person's overall mental health and contributing to feelings of depression.

While other deficiencies like vitamin D, certain minerals, and protein can also have effects on mood and mental health, research has particularly highlighted the significant connection between deficiencies in vitamin B12 and manifestations of depression. This distinguishes it as a crucial nutrient in understanding and addressing depressive disorders.