Supports Energy & Mental Clarity Helps Maintain Healthy Iron Levels Highly Absorbable One Capsule Per Day Non-Constipating Vegan + Gluten-Free Doctor Developed Dietary Supplement SloIron Inc. 21st Century Iron Controlled Release Iron for Consistent Energy. Many healthcare providers recommend taking an iron supplement if you're low on this essential mineral. But form matters. Enter Ferritin+, a plant-based ferritin-iron extracted from organic peas. Ferritin is a naturally protein-coated form of iron found in legumes that allows for controlled release and efficient absorption, which helps to minimize digestive upset. Our clinical studies have shown that plant-based ferritin iron can effectively increase and maintain healthy iron levels. Support your energy levels and red blood cell production with Ferritin+.