I've heard that having low B-12 or B-6 can cause depression. Is that true?
Yes, being deficient in vitamin B-12 or B-6 can cause depression. Correcting a deficiency in one of these vitamins may help improve symptoms of depression, and some B vitamins may increase the effectiveness certain antidepressant medications, such as SSRI's. For more about B vitamins and depression, see the "What It Does" section of the B Vitamins Supplements Review >>