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A Comparative Study Between Labeling and Reality: The Case of Phytochemical Composition of Commercial
Marina Cano-Lamadrid1, Leontina Lipan1, Ángel Calín-Sánchez1
1Dept. of Agro-Food Technology, Food Quality and Safety Group, Univ. Miguel Hernández de Elche, Escuela Politécnica Superior de Orihuela, Carretera de Beniel, km 3.2, 03312, Orihuela, Alicante, Spain.
Abstract:
Manufacturers are deeply involved in the development of new pomegranate-based products, which have acquired great prestige due to many studies proving their potential health benefits. Commercial pomegranate products including capsules and supplements and juices and nectars were assayed. The contents of the key phytochemical compounds (punicalagin, ellagic acid, and total polyphenolic content) and the associated antioxidant capacity (DPPH• , ABTS•+ , and FRAP) were analyzed. The experimental ranges of punicalagin and ellagic acid contents were 0.96 to 308 mg/g and 0.09 to 13.1 mg/g, respectively. Punicalagin content was positively correlated (P < 0.001) with DPPH• and total polyphenolic content values. No significant (P > 0.05) correlation was observed among ellagic acid with the antioxidant capacity. The labeling standardization of these products is necessary due to the wide variability among "theoretically" similar pomegranate-based products.
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