Nutritional, Physical and Sensory Properties of Soybean Mayonnaise

Abstract

The unrivalled nutritional and health benefits derivable from soybean consumption need to be harnessed maximally to combat the increasing prevalence of notable non-communicable diseases. This study was therefore designed to determine the nutritional and sensory properties of soybean mayonnaise. Conventional mayonnaise is an oil-in-water emulsion mixture of egg, vinegar, oil and spices. Egg and vinegar were replaced with soymilk and lemon juice to give soy mayonnaise samples: LRS1 (full-fat) and LLS1 (low-fat) while a conventional commercial mayonnaise brand served as control (BS1). Proximate, vitamins, cholesterol, fatty acid profile, texture, colour and sensory evaluation were carried out using standard methods. Mean data were comparedusinganalysisofvarianceatp=0.05. ProteincontentforBS1,LRS1andLLS1were;1.03,1.90and 2.80% respectively while the fat content were; 72.93, 31.53 and 10.40 for BS1, LRS1 and LLS1, respectively. Soy mayonnaise samples were significantly higher in protein, ash, carbohydrate, thiamine, riboflavin and niacin than the control and they contained no cholesterol unlike the control sample. Soy mayonnaise samples were significantly higher in unsaturated fatty acids (oleic and linoeic acids) but significantly lower in saturated fatty acids than the control sample. For texture parameters the soy mayonnaise samples were significantly higher than the control in peak force, stickiness, area and gradient but at par with the control in stringiness, peak time and adhesiveness. LRS1 and LLS1 were significantly higher than control in Lightness but significantly lower in redness than control. The sensory evaluation test scores were within acceptable range for both control and soy mayonnaise samples except for the texture score for soy mayonnaise which was neither liked nor disliked. This study shows that soymilk has good potential in the production of mayonnaise as a functional food. Soy mayonnaise is more nutritious and heart friendly than the conventional commercial mayonnaise brand and is suitable for all, even vegans.