A Comparative Study Between Labeling and Reality: The Case of Phytochemical Composition of Commercial Pomegranate‐Based Products

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.

Nutrition Quality Parameters of Almonds as Affected by Deficit Irrigation Strategies

“…Regarding the almond skin, the TPC and antioxidant activity (ABTS and DPPH) were not affected by the irrigation treatments, except for FRAP method, which showed that T2 was similar to the control and T4 had the lowest antioxidant activity. These results agreed with Cano Lamadrid et al [32] and Sánchez-Rodríguez et al [12] in studies investigating effects of deficit irrigation on quality and functional profiles of table olives (hydroSOStainable olives) and pomegranates, respectively [9,12,33]. An increase, however, in polyphenols and antioxidant activity was observed for lettuce growing under water stress conditions [34] and grapes from clusters exposed to RDI (compared with SDI), which might happen due to the reduction of canopy leaf area of vines under RDI conditions [35].…”

A Critical Overview of Labeling Information of Pomegranate Juice‐Based Drinks: Phytochemicals Content and Health Claims

“…On the other hand, TPC was positively correlated with PC as Türkyılmaz, Tağı, Dereli, and Özkan () reported; the total phenolic compounds of Pom juices significantly correlated with the PC ( R = 0.94; p < 0.005). Moreover, Pearson correlation showed that the correlation of TPC was affected by EA content, as mentioned in previous research (Borges et al., ; Cano‐Lamadrid et al., ). On the contrary, Todaro et al.…”

“…() reported that Sicilian and Spanish pomegranates (sweet cultivars such as Dente di cavallo , Violetto , Mollar de Elche , Valenciana ) presented TA from 1.3 to 2.5 g citric acid/L. Besides, there are high differences in TA between sweet and sour cultivars; for instance, Mollar de Elche juice has a mean value of 1.51 g citric acid/L while Wonderful juice had a TA value of 7.32 g citric acid/L (Cano‐Lamadrid, Lipan, Calín‐Sánchez, Hernández, & Carbonell‐Barrachina, ). Therefore, most of the studied samples were probably made from a blend of cultivars.…”

“…On the contrary, Crecente‐Campo, Nunes‐Damaceno, Romero‐Rodríguez, and Vázquez‐Odériz () reported that strawberries from organic cultivation have a significantly higher content of individual anthocyanins than samples from conventional production. Thus, differences may be due not only to agricultural practices, but also to the Pom cultivar used (Cano‐Lamadrid et al., ), and processing and storage conditions. Alper, Bahçeci, and Acar () studied the influence of processing and pasteurization on the color of Pom juices.…”

“…Then, the extract was again sonicated for 15 min, and centrifuged at 15,000 × g for 10 min. Punicalagin (Pn) (sum of α and β isomers) and EA contents were determined using the method proposed by Cano‐Lamadrid, Lipan, Calín‐Sánchez, Hernández, and Carbonell‐Barrachina ().…”