There are a number of nutrients that are important when it comes to reducing anxiety levels. Consider the B Vitamins. Vitamin B1 is important for balancing blood sugar levels, which are a significant factor in anxiety stress levels. Vitamin B3 plays a crucial role in the synthesis of serotonin and has been shown to help anxiety. Vitamin B5 supports the adrenal glands, which reduces stress and anxiety levels. Vitamin B9 (folic acid), and B12 are important in balancing out depressive moods. It is always a good idea to take a good B complex alongside individual B vitamins, as they work synergistically.