Definition. noun, plural: autotrophs. A organism capable of making nutritive organic molecules from inorganic sources via photosynthesis (involving light energy) or chemosynthesis (involving chemical energy) Supplement
Spinach also contributes to your daily intake of iron and calcium. Although spinach naturally contains sodium, it only provides 25 milligrams per cup and the 10-ounce bag contains only 224 milligrams, increasing its desirability as a heart-healthy food.
Recommended Serving Size: 1 cup of raw spinach, 29 milligrams of calcium, 20 calories 1/2 cup cooked spinach, 122 milligrams of calcium, 45 calories (This amount of cooked spinach has more calcium because it actually represents three to four cups of raw spinach.)