With the growing popularity of low-carb diets, you may wonder if whole-grain breakfasts like oatmeal are still healthy. Whole grains are completely whole and consist of three separate parts: bran, endosperm and embryo. As a result, whole grains contain more nutrients, vitamins, minerals and fiber than their processed or refined counterparts. In particular, oats are rich in soluble fiber called beta-glucan, which is good for heart health. Most experts will agree that in terms of a healthy diet, oatmeal takes pride of place.