Effects of dietary supplementation with polyphenols on meat quality in Saanen goat kids

Abstract

BackgroundDiet supplementation with polyphenols is a novel strategy to improve meat quality in livestock, by preventing oxidative deterioration of lipids and protein. Polyphenols have beneficial effects on both human and animal health and can be obtained from several sources, such as olive mill wastewaters (OMWW). These are severe environmental pollutants and therefore may be recycled and utilized in other sectors. The aim of this study was to evaluate growth performance, meat characteristics, fatty acid composition, antioxidant status, different forms of myoglobin and malondialdehyde formation in kids who received a diet supplemented with polyphenols obtained from OMWW. Weaned goat kids (n = 18) were divided into two homogenous groups: control (C) group (n = 9) received a fattening standard diet while the other group (n = 9) received the same diet, supplemented with 3.2 mg/day of polyphenols powder extract (PE group). Average daily gain (ADG) was calculated 10 days apart throughout the study. After 78 days, the kids were slaughtered and pH and carcass yield were evaluated. Longissimus thoracis et lumborum muscle was collected and utilized for chemical analysis, meat quality evaluation and oxidative stability.ResultsNo differences were recorded in ADG, carcass weight, pH and dressing between the two groups. Furthermore a similar meat proximate composition, texture and color was observed. Dietary polyphenols supplementation significantly (P < 0.01) decreased short chains (<C12:0) (2.93 + 0.50 and 0.35 + 0.40 g/100 g of fatty acids, for C and PE Group, respectively), and saturated (49.22 ± 2.39 and 39.51 ± 1.95 g/100 g, in C and PE Group, respectively) fatty acids. Furthermore, a higher (P < 0.05) proportion of monounsaturated (34.35 ± 2.84 and 42.22 ± 2.32 g/100 g, in C and PE Group, respectively) fatty acids was recorded. Malondialdehyde formation was significantly (P < 0.05) lower in PE compared to C Group (0.25 ± 0.005 and 0.15 ± 0.005, in C and PE Group, respectively).ConclusionsPolyphenols dietary supplementation has positive effects on kid meat, improving fatty acid profile and reducing malondialdehyde contents. Furthermore the utilization of OMWW as the source of polyphenols may represent an innovative strategy to re-utilize agri-food industry wastes.

Dietary Polyphenol Supplementation in Food Producing Animals: Effects on the Quality of Derived Products

“…Goat kids fed with 3.2 mg/day of polyphenols powder extract obtained from Olive mill wastewaters produced meat characterized by a significant reduction of short and saturated fatty acids. Furthermore, a higher (p < 0.05) proportion of monounsaturated fatty acids was recorded in the treated group with a concomitant lower (p < 0.05) MDA formation in the treatment group compared to control group, and no effects were recorded on PUFA [119]. As reported by authors the acidic composition of meat in ruminants is generally different from that of non-ruminants.…”

Functional analysis finds differences on the muscle transcriptome of pigs fed an n-3 PUFA-enriched diet with or without antioxidant supplementations

“…This evidence has drawn the attention of clinicians and animal scientists to the possibility of turning animal-derived products into functional foods providing health benefits to consumers [35–37]. Studies have reported that the content of n -3 PUFA in swine muscle can be increased adding oilseed ingredients to the feed [38,39], and the addition of antioxidant compounds such as vitamin E and polyphenols can help to avoid lipid oxidation [38,40]. Anyway, the knowledge on the muscle physiological processes influenced by dietary antioxidant addition is still poor and could involve a large number of genes associated with both muscle metabolism and structure [41].…”

Biomarkers in Stress Related Diseases/Disorders: Diagnostic, Prognostic, and Therapeutic Values

“…Recently, MDA has been evaluated as an oxidative stress diagnostic biomarker in diabetes (Yatoo et al, 2016; Ma et al, 2018), ketosis, ovarian cyst, mastitis and lameness (Kapusta et al, 2018). Its elevated concentration in milk and meat has shown deleterious effects on milk (Yatoo et al, 2015; Kapusta et al, 2018), and meat (Cimmino et al, 2018) quality and hence can serve as a quality biomarker in foods.…”