Cashews are very nutritious and a powerhouse of proteins and essential minerals including copper, calcium, magnesium, iron, phosphorus, potassium, and zinc. Sodium is also present in very small quantities. Cashews also contains vitamins such as C, B1 (thiamin), B2 (riboflavin), B3 (niacin), B-6, folate, E (alpha-tocopherol) and vitamin K (phylloquinone). Cashews are a source of oleic acid and provide a good quantity of monounsaturated fat and low amounts of polyunsaturated fats with no harmful cholesterol, if consumed appropriately.