They have a healthy dose of calories, carbohydrates, and even some amount of proteins. The minerals in raisins comprise iron, potassium, magnesium, copper, zinc, phosphorous, and calcium. A healthy dose of Vitamin B along with small quantities of folate, Vitamin C and Vitamin K also come included in the package. Being as nutrient-dense as they are, a handful of raisins can drastically increase your energy quotient due to the calories they contain. Also since a small quantity does the trick, it will not burden your belly as in the case of heavy snacks.