Do you have iron deficiency and not know it? Fatigue, weakness, and cold intolerance are common symptoms of low iron. Standard blood tests may not reflect early iron deficiency. There is, however, a special lab test that tells you how good your iron stores are even before extensive changes occur. This lab test is called serum ferritin. Serum ferritin levels reflect the actual amount of iron stores in the body. A depletion of iron stores indicates a functional deficiency and early iron deficiency, which can cause a variety of health disorders. There is more to low serum ferritin and iron deficiency than meets the eye.
