The normal range of ferritin is 12 to 245 μg/L in adult men and 5 to 130 μg/L in adult women. Low ferritin indicates that the measurement is below the normal range. Ferritin is a complex of iron-containing proteins with large molecular weight. Low ferritin may be caused by insufficient iron intake and impaired iron absorption. 1. Insufficient iron intake: Insufficient iron intake is usually found in people who are partial to food and picky eaters, pregnant women, infants and young children are also prone to insufficient iron intake, which will lead to low ferritin if it is insufficient for a long period of time. You can supplement iron containing foods, such as spinach, animal offal, etc., and if necessary, you can supplement iron supplements, such as ferrous succinate, etc., under the guidance of a doctor. 2. Iron absorption disorder: if the vitamin C deficiency of people or patients suffering from gastrointestinal diseases, will affect the absorption of iron, resulting in insufficient intake of iron, resulting in low ferritin. It is necessary to actively treat gastrointestinal diseases, such as giving omeprazole acid-suppressing gastric protection treatment, and vitamin C supplementation. If the ferritin is low, it is recommended to go to the hospital in time, identify the cause and take appropriate treatment measures under the guidance of the physician.