Rice Krispies noun (A trademark for) a breakfast cereal made from grains of rice which are steamed, sweetened, and then heated rapidly in the manner of popcorn; (also in singular) a piece of this cereal.
A ferritin test measures the amount of ferritin in your blood. Ferritin is a blood cell protein that contains iron. A ferritin test helps your doctor understand how much iron your body is storing.
Full Answer. A normal ferritin level ranges from 12 to 150 nanograms per milliliter in women and 12 to 300 nanograms per milliliter in men, reports MedlinePlus. The ferritin blood test helps determine if there is enough iron stored in the body for later use.