It's filled with fiber, some protein, and other important minerals like magnesium and potassium. (bembu.com)
In addition, the whey contains most of the calcium and other important minerals which would be partially lost. (thehealthyhomeeconomist.com)
Although not as popular as some of the other grains, barley provides a good serving of fiber and many other important minerals such a selenium. (mealpreponfleek.com)