Study on the Effects of Lemon Juice on Chemical and Functional Properties of Some Fruit Juices

Natural antioxidants from fruit juices have been interesting in terms of safety and low risk of side effects. Lemon juice was added to apple, grape, orange, pineapple and watermelon juices to obtain various concentrations. The blends were assayed for total phenolic content and total antioxidant capacity as well as superoxide dismutase (SOD)-like activity. The highest phenolic content was present in 50% (v/v) lemon juice in pineapple blend (425.1±5.1 μg/ml) in comparison to original juice. The total antioxidant capacity and SOD-like activity in the juice blends increased with increasing the proportion of lemon juice when compared with original juice. Our study indicated that lemon juice enhanced health benefits in terms of total phenolic content, total antioxidant capacity and SOD-like activity.