Unrefined grains are whole grains — the terms are synonymous. Refined grains are those which have had their bran and germ removed, which makes them easier to work with. Most commercial grain foods are made with one or more refined ingredient. Typically, that’s refined flour, but many other common grains used in cooked and baked products — such as rolled oats — also fall into the category of “refined.”  With that said, your main takeaway from this article should be that while whole grains may be nominally better than refined grains, the overall health benefits of grains have been grossly overstated. Functionally, there’s no meaningful difference between whole and refined grains — and I'd go so far as to say there are no truly healthy grains. You can't avert the negative properties of these foods by, for example, opting for whole-grain flour over the more heavily processed version.