Iron and Manganese are associated trace elements considered essential to human health. As is the case with most other associated mineral pairs, the absorption of iron is dependent on manganese, however with manganese levels being frequently lower than iron levels, and with many forms of iron causing constipation or gastric upsets when supplemented, the addition of manganese, when low, is vitally important. This not only prevents further ratio conflicts between the two elements, but also substantially reduces the amount of iron needed when manganese is supplemented at the same time... Full Text