The B vitamins, including B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6 (pyridoxine), B7 (biotin), B9 (folate), and B12 (cobalamin), are essential for brain function and emotional well-being. Deficiencies in certain B vitamins have been linked to symptoms of depression and mood disorders. Incorporating foods rich in B vitamins, such as leafy greens, whole grains, nuts, and legumes, or taking a B-complex supplement, may help support mental health.