Raisins are loaded with fibres, which swells when they absorb water and effectively provide relief from constipation. Regular intake of raisins help regularize bowel movement as the fibres remove the toxins and wastes from the gastrointestinal tract.Raisins pack more nutrition than their small size might indicate. When grapes are dehydrated to produce raisins, the nutrients become more concentrated, making a handful of raisins a snack rich in B vitamins, iron, and potassium. Besides nutrients, raisins are also a good source of carbohydrates for energy.