So many people are low in iron. This is a version that does not cause typical digestive side effects like constipation, bloating, or dark stools. It is safe for vegetarians, pregnant and nursing women, and adults. Iron Chelate is a potent iron supplement that is extremely well tolerated by the gastrointestinal system. Our iron is a premier chelate from Albion Advanced Nutrition. It is safe for use by pregnant and lactating women, teenagers, and adults. Unlike most iron preparations, it will not result in constipation or gastric upset.