Vitamin B6 helps the immune, cardiovascular, digestive, nervous and muscular systems to function effectively, according to Everyday Health. It also helps the body make melatonin, serotonin and norepinephrine.
Vitamin B6 helps in brain development in fetuses and infants, and in immune function, explains the National Institutes of Health Office of Dietary Supplements. This vitamin is also necessary for more than 100 enzyme reactions needed in metabolism. Research shows vitamin B6 can help with premenstrual syndrome, and nausea and vomiting in pregnancy. The American Congress of Obstetricians and Gynecologists advises pregnant women to take vitamin B6 supplements under the supervision of their doctor to control the symptoms of morning sickness. There are certain studies that suggest vitamin B6 can reduce the symptoms of premenstrual syndrome such as moodiness and bloating.
Some research shows vitamin B6 may reduce depression symptoms, reports the University of Maryland Medical Center. This is probably because vitamin B6 helps in the production of serotonin, which is a chemical that influences mood. Preliminary studies also suggest vitamin B6 may be helpful to patients who suffer from rheumatoid arthritis. This vitamin may also reduce the symptoms of tardive dyskinesia. Vitamin B6 helps to lower homocysteine, which is an amino acid linked to heart disease. However, more research is needed to conclude if lowering homocysteine reduces the risk of heart disease.