Pyridoxal-5-Phosphate (Vitamin B6): 6 mg B6 is a co-factor required for protein and amino acid metabolism, and helps maintain proper fluid balance. It also assists in the maintenance of healthy red and white blood cells, which keeps our body healthy. Because vitamin B6 is involved in the synthesis of neurotransmitters in the brain and nerve cells, it has been recommended as a nutrient to enhance mental function, specifically mood.