Wheatgrass is rich in vitamins A, B complex, C, and E. This green machine also contains iron, zinc, magnesium, potassium, phosphorus, calcium, and selenium. Selenium is a powerful antioxidant and may have some cancer fighting abilities. It also aids in good thyroid function, improves blood flow, helps lower risk of heart disease, and it may even be linked to good respiratory function. Did I mention it’s also an immune-booster? What’s not to love? Wheatgrass has been a staple in high impact health food diets for quite some time and is used in smoothies or juiced on its own.