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.
Nutritional Profile. A 100-gram serving, or just over 1/2 cup, of plain, boiled spinach contains 23 calories, just under 3 grams of protein, very little fat and 3.75 grams of carbohydrates, of which 2.4 grams are dietary fiber and less than half a gram is naturally occurring sugar, according to the U.S. Department of Agriculture.