Effects of Blueberry, Grape Seed Powder and Poppy Seed Incorporation on Physicochemical and Sensory Properties of Biscuit

Blueberry, defatted grape seed powder and defatted poppy seeds were incorporated into biscuits at a level of 5%. Some physicochemical and sensory characteristics were evaluated during 5 months storage period. Diameter, a* (-a=greenness, +a=redness) values, ash, fat, crude fiber, Mg and Ca contents increased, while L* (lightness), b* (-b=blueness, +b=yellowness) values decreased significantly (P<0.05). A significant type of fortification agentxstorage time interaction (P<0.05) existed for all physicochemical parameters analyzed. Defatted poppy seed was the most effective agent for preventing increased peroxide values, whereas defatted grape seed powder addition decreased free fatty acid formation better than blueberry and defatted poppy seeds. All fortification agents increased the total phenolic content of biscuits. Biscuits having 5% blueberry exhibited a high percentage of antioxidant activity. Sensory evaluation results revealed that fortificated biscuits cannot be consumed after 5 months. Practical ApplicationsAs the relationship between nutrition and some chronic diseases have been established, the number of research and development studies focusing on functional foods has increased rapidly. Antioxidants became popular because of their positive effects on human health. Grape seed, a by-product of the grape-processing industry, is known as a strong free radical scavenger. Poppy seeds are generally used for their high oil content. Tocopherols found in poppy seeds have strong antioxidative properties. Blueberries, rich in anthocyanins, are widely consumed in different countries. These three botanical ingredients can be used as inexpensive antioxidant sources in snack foods such as biscuits and cookies.