Absorption of iron through diet relies on the proper functioning of the digestive system and stimulation of gastric juices. Igennus uses iron bisglycinate, a gentle chelated form that helps to reduce occurrences of nausea and constipation usually associated with iron supplementation. Iron bisglycinate offers 4x better absorption than ferrous sulphate and has up to 90% better bioavailability than other traditional and more poorly absorbed iron forms.