Dietary fat substitutes have existed for over a decade, many fat substitutes have been developed over
the previous years. carbohydrates, proteins, fats, or a combination of them can all be used as fat substitutes. The
current study used varieties of sugar with fatty acid separated from soybean soap stock to synthesize polyesters.
The fatty acid of soybean soap stock was extracted, characterized as follows: free fatty acid yield in soybean
soap stock was 17.16 %, the acid value was 199.1 mg KOH/g, iodine value was 123.3 mg I2/100 g, and the
saponification value was 191.00 mg KOH/g and identified by gas chromatography (GC). Then, sugar polyester
was synthesized by esterifying glucose, sucrose, maltose, and lactose by esterification. The yield of sugar
polyesters ranged from 25.94 to 68.5%. The obtained fractionations of fatty acids from the sugar esters samples
were identified by GC. The obtained soya sugar polyesters contained high amounts of unsaturated fatty acids
ranging from (82.23 - 84.3 %) of the total fatty acid, against only 15.68 - 17.75 % of total saturated fatty acids.
Sugar polyesters components were verified using infrared (IR) and H1 nuclear magnetic resonance(H1–NMR)
spectroscopy. The physiochemical properties of polyesters were similar to the fatty acid of soybean soap stock