Hi Gerrie, whole grain mustard is made with whole mustard seeds (not actual grains). (cookeatpaleo.com)
... This article argues that China's actual grain production levels may be substantially lower than the officially reported levels; in fact, grain production has stagnated since the late 1990s. (monthlyreview.org)
The «grains» that are used to create Kefir are not actual grains but are actually a polysaccharide matrix containing a symbiotic culture of bacteria and yeast (just like a Kombucha SCOBY). (store.kombuchakamp.com)