The pine nut is actually a seed produced by a certain variety of pine tree. They are tiny, but underestimate its goodness. Pine nuts are an excellent source of Iron, Manganese, Copper, Magnesium and high monounsaturated fat, which keeps your cardiovascular system healthy. It’s also packed with Vitamins A,C & D. This makes it give a boost to the immune system. They contain almost three milligrams of iron in one-ounce serving. Pine nuts are also higher in Protein than most nuts and are a good source of Thiamine, Potassium and phosphorus. Pine nuts are best kept in the refrigerator, in airtight containers.