a non - blooming plasticizer composition and methods of using the composition are described herein . the composition is a mixture of sorbitol and sorbitan wherein the ratio of sorbitan and sorbitol is between about 0 . 40 and about 1 . 2 by weight , more preferably from about 0 . 45 - 0 . 50 to about 0 . 70 by weight , wherein the composition contains less than 20 % of other dextrose hydrolytic degradation products . the non - blooming plasticizer compositions can be mixed , alone or in combination with other shell additives , with gelatin or non - gelatin materials to prepare soft capsules for the delivery of pharmaceutical , nutritional and personal care products , such as bath oils , shampoos and conditioners , and skin lotions .