Hull-less barley flour contributed to significant increases of Cu, Zn, Fe and Se, compared to the controls.
These findings were not surprising, knowing that the mineral compositions of high-oleic sunflower seed and hull-less barley differ significantly from those of wheat flour.
For instance, it was found that the amounts of Cu in hull-less barley and high-oleic sunflower seed (Škrbic´ & Cˇupic´ , 2008) were almost two and five times higher than those in wheat grain (Škrbic´ et al., 2005), respectively. Similarly, Zn contents in hull-less barley and high-oleic sunflower seed (Škrbic´ & Cˇupic´ , 2008) were found to be 1.5 and 2.5 times higher than that in wheat (Škrbic´ et al., 2005).
In the case of K and Mg, a significant rise of contents was found only in the case of supplemented cookies made from refined wheat flour whereas, in the wholegrain cookies supplemented with barley flour their contents decreased compared to the controls.
The addition of hull-less barley decreased the K and Mg contents in wholegrain cookies because hull-less barley, containing less of these minerals, replaced a part of the wholegrain wheat flour.
Supplementation with hullless barley decreased the Ca content in both types of cookies in comparison to the controls.