Pistachios are both fun to eat and very useful for health. It contains plenty of antioxidants and vitamin B 6 in pistachios. Vitamin B 6 contained in pistachios is important for various functions such as the formation of hemoglobin, a molecule carrying oxygen in red blood cells. Pistachio is also rich in potassium. 1 handful of Pistachios contains more than half of one big banana.