https://www.verywellfit.com/health-benefits-of-green-leafy-vegetables-2242154
"Dark green vegetables deliver a bonanza of vitamins, minerals, and phytonutrients. Dark green leafy vegetables are among the most nutritious.
But almost any veggie that is dark green in color will add value to your diet. The family of dark green leafy vegetables delivers many nutrients, such as vitamin A, vitamin C, antioxidants, fiber, folate, vitamin K, magnesium, calcium, iron, and potassium."