Grenoble nuts are nuts that come from the walnut of the surroundings of Grenoble. They are known for their hard shell and their delicate and hazelnut flavor. Grenoble nuts are rich in healthy fats, protein and dietary fiber. They are also a source of vitamins and minerals, including vitamin E, magnesium and phosphorus. They also contain unsaturated fatty acids, which can help regulate blood cholesterol and prevent cardiovascular disease.