GNC Iron 18 mg is a dietary supplement that provides 18 mg of ferrous fumarate, a form of iron with increased bioavailability. This product is essential for the formation of red blood cells and hemoglobin, which are crucial for oxygen transport in the body. It also supports energy metabolism and muscle function. The supplement is Kosher certified and suitable for vegetarians and vegans. It does not contain sugar, starch, artificial flavors, dyes, preservatives, wheat, gluten, corn, soy, dairy, or fermentation products. Each bottle contains 100 tablets, providing a 100-day supply.