We buy noodles labeled as made with buckwheat or whole grain brown rice. Sometimes the ingredients label is not so easy to understand. I always look for the first ingredient to say, whole grain. Kelsey said you can look at the fiber content which will give you an idea. For example, the buckwheat noodles in the image below have 8% of your daily recommended intake of fiber and buckwheat is, in general, is a whole grain. You can probably bet that it's whole grain in this case. If it says refined or enriched before wheat, bean starch, or other grains, it's not whole grain and not as healthy.