Copper, iron and zinc, considered essential elements in the human body, present changeable biodisponibility in chemical form more than if found in a food. Medicinal plants, widely used, can present new indications as to how much the suplementation of these metals, aiming at such an objective, can be shown to evaluate the amounts of copper, iron, and zinc in medicinal plants, powder and dry grass, and to promote the extraction sequencial aiming at the biodisponibility. The copper amount, iron and zinc had been determined through the spectroscopy of atomic absorption. The extraction sequencial was applied with the extractors calcium chloride 1,0M; acetic acid 0,1M with ammonium acetate 5% ( pH=5,0 ); acetic acid 0,5M and HCl 0,5M. The results had presented high copper amount, iron and zinc, when compared with other nourishing sources of these metals, besides indicating that the same ones if present under at the very least 4 distinct chemical species in the analyzed grass. The extracting (I) was of better efficiency for the three metals. Considering that the consumption of these grass is made with farmacological action, it is given credit that use of the same ones in foods can be used as fonts of these metals.
medicinal plants; copper; iron; zinc; biodisponibility; sequencial extractios
