Check the listing for details. Gentle Iron®, 25 mg, 180 Vegetable Capsules. Condition: New. Listed at 20.39 USD. Since 1947 Iron Bisglycinate Non-Constipating Gentle On Your Stomach Halal Non-GMO Wheat & Dairy Free Suitable for Vegans Certified Gluten Free Kosher Parve Dietary Supplement Iron is an essential trace mineral found in most human cells. It is an important component of hemoglobin, the protein that carries oxygen from the lungs to all tissues of the body and promotes iron rich blood. It plays a role in normal red blood cell production and supports energy utilization. Iron requirements increase during growth, pregnancy and menstruation. Iron nutritionally supports women's health and is a cofactor required for the synthesis of brain neurotransmitters, including dopamine, norepinephrine and serotonin. Some iron supplements cause gastrointestinal irritation and constipating effects.