Broccoli sprouts are 3-4 day old broccoli plants that have a similar appearance to alfalfa sprouts and when eaten taste the same as radishes This rich green vegetable contains fibre, calcium and vitamin C, making Broccoli sprouts a good addition to any diet Famous for it's antioxidant content. Broccoli sprouts can contain something like 50 times the sulfurophane found in mature broccoli, by weight, so you get as much antioxidant in 1 ounce of Broccoli Sprouts as you would if you ate 3 pounds of fully grown Broccoli.