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.
Most of the calories in spinach come from protein. Spinach is one of the best sources of dietary potassium, weighing in at 839mg per cup (cooked). To compare, one cup of banana has about 539mg of potassium. A lack of iron in your diet can effect how efficiently your body uses energy. Spinach is a great non-heme source of iron, along with lentils, tuna and eggs. Spinach contains approximately 250mg of calcium per cup (cooked), however it is less easily absorbed than calcium from sources like dairy products.