Intravenous iron is the best way to absorb iron supplements into our blood directly avoiding the common side effects of constipation, nausea, and vomiting. However, this method is tedious, inefficient, inconvenient, and not cost effective. Oral iron supplements are notorious for causing nausea, vomiting and constipation. Also, they must be dosed multiple times a day for long term due to their poor absorption. Frunutta iron supplements allow absorption directly under the tongue and avoid all the side effects associated with oral swallowed irons. Frunutta iron can be taken every morning on an empty stomach by simply placing the tablet under the tongue prior to brushing your teeth.