For teens in particular, B vitamins help to support skin and immune health, the nervous system, stress response, and energy levels.   Our bodies deplete B vitamins more quickly in times of stress, and signs of this depletion may include fatigue, irritability, weakness, digestive issues, and anemia.  

 

Vitamin B6 helps your body make serotonin, a chemical that influences mood. Low levels of serotonin are associated with depression, and some antidepressant medications work by raising levels of serotonin.