Vitamin B12 is a nutrient that helps keep the body's nerve and blood cells healthy and helps make DNA, the genetic material in all cells.

A folate test determines the level of folate in the blood. Folate is one of a number of B vitamins. The body requires folate for...

Ferritin is a blood protein that contains iron. A ferritin test helps your doctor understand how much iron your body stores.

A folate test determines the level of folate in the blood. Folate is one of a number of B vitamins. The body requires folate for appropriate...