When we don’t eat enough fruits and vegetables (and a CDC study found that between 76 - 87% of us don't) we miss out on essential nutrients, which can lower our risk of disease and illness. According to the Centers for Disease Control (CDC), adults should consume 1.5 - 2 cups of fruit and 2-3 cups of vegetables daily. If you are not getting your recommended daily intake, it's important to supplement them.