Because of this, they often have a high number of minerals and vitamins. (adamkempfitness.com)
That said they contain some nutrition e.g the dates have a good number of minerals - more than can be said for white sugar! (veganetcetera.com)
Complex carbohydrates are foods that contain a rich number of minerals, vitamins, and antioxidants; such as beans, brown rice, oatmeal, quinoa, peas, potatoes, and lentils. (adamkempfitness.com)