Comparative Study between Nutritional Compositions of Processed White and Yellow Flesh Sweet Potato.

Three sweet potato genotypes NSP-2, NSP-6 (white flesh) and NSP-12 (orange flesh), were subjected under different processing techniques (boiling, steaming, and roasting) to check the nutritional status. Sugars like glucose, fructose, sucrose, and maltose was increased under roasting treatment for all of the genotypes. Crude fiber, cellulose, hemicellulose and ash content were significantly deferred within different genotypes but different treatments remained at par with various processing techniques. Steaming was proved to be the best treatment to decrease loss of vitamin C and phenol content where as roasting was the best performing treatmant to decrease the antinutrients like phytic acid and trypsin inhibitor activity. Comparatively, higher antioxidant activity was observed in steaming treatmet. NSP-12 revealed comparatively lower Glycemic index (GI) indicating high amylase: amylopectin ratio may become a good source of good carbohydrate for diabetic friendly food for near future. [ABSTRACT FROM AUTHOR]