In many languages, including French the equivalent of the world nut refers primarily to the fruit of the walnut tree, its generic meaning being secondary. Often eaten as a snack, walnuts are also added to desserts as well as to sandwiches, cheese, and main dishes. They can also be used as condiment in pasta sauces. They are an excellent source of copper and magnesium. The fat in walnuts consists of 86% unsaturated acids.