Fresh Spinach

Famous for being the secret to Popeye’s legendary strength, spinach is truly a nutritional powerhouse—and perfect for green smoothies. A Harvard University study found that women who ate spinach more than five times a week had a 47 percent decrease in risk of cataract surgery compared with those who ate spinach less than once a month. Lutein, found in spinach, may also benefit eye health by reducing the risk of macular degeneration, according to the American Macular Degeneration Foundation. Vitamin A and vitamin K are two of the prevalent vitamins in spinach and they are known to help regulate blood flow, maintain bone health, preserve cell health and help the cells in the body grown normally.