Leafy greens have folate (also called vitamin B9), a nutrient the body's cells need to stay healthy. Low levels of folate can result in anxiety, irritability, forgetfulness, insomnia, confusion, and depression. It is also believed that folate may make antidepressant medications more effective. Folate is found naturally in foods whereas folic acid is a synthetic version found in supplements. Other than dark leafy greens such as spinach and kale, folate can be found in: lentils, asparagus, Brussels sprouts, nuts, beans, peas, fruit and fruits juices (especially oranges and orange juice). Folic acid is also added to many grain products such as cereals, pasta, and rice.