One cause of low iron in blood circulation is bacterial infection. When bacteria invade the body, iron is transferred out of the blood and into ferritin for storage.

Folate requires intrinsic factor (IF) for absorption. IF is made by cells within the stomach lining and attaches to folate in the small intestine. This folate-IF complex facilitates folate absorption through the ileum of the small intestine. 

Microcytic hypochromic anemia is caused by a deficiency of which nutrient? In other words, which nutrient inadequacy is the primary cause of microcytic anemia?

Vitamin B12 deficiency is a common nutrient deficiency in the United States. The primary cause of vitamin B12 deficiency is not eating sufficient vitamin B12 to meet the Recommendation Dietary Allowance (RDA). In other words, the majority of Americans do not eat foods rich in vitamin B12.

Vitamin A deficiency can lead to more frequent infections. 

Which form of vitamin A is abundant in carrots, spinach, cantaloupe, apricots, and broccoli?

Which chemical form of vitamin A is needed for normal vision?

All body fat is not equally harmful to health. Body fat in some locations is more harmful than in others. Where within the body is excess fat associated with atherosclerotic cardiovascular disease, hypertension, type 2 diabetes, and many cancers?

Long-term inadequate vitamin B12 (cobalamin) intake can lead to which type of anemia?

Which of the following does NOT occur as a result of parathyroid hormone?