Goats’ Feeding Supplementation with Acacia farnesiana Pods and Their Relationship with Milk Composition: Fatty Acids, Polyphenols, and Antioxidant Activity
Open Access
- 1 August 2019
- Vol. 9 (8), 515
- https://doi.org/10.3390/ani9080515
Abstract
Background: Research efforts have focused on the evaluation of the bioactive quality of animal products (milk, cheese, meat, and other by-products) contrasting various feeding strategies coming from different ecological zones. The study aimed to describe the fatty acids (FA), polyphenols (P), bioactive compounds (BC), and antioxidant activity (AA) of goat’s milk. Methods: Dairy goats were fed with five systems: (1) Grazing; (2) conventional diet (CD); (3) CD + 10% of Acacia farnesiana (AF) pods; (4) CD + 20% AF; and (5) CD + 30% AF. The fatty acid profile, health promoting and thrombogenic indexes were calculated. Milk extracts were evaluated by HPLC to determent phenolic compounds (gallic, caffeic, chlorogenic, and ferulic acids, catechin, epicatechin, and quercetin). Antioxidant activity of goat’s milk extract was evaluated using 2,2-diphenyl-1-picrylhydrazyl radical (DPPH•), oxygen radical absorbance capacity (ORAC), and the ferric reducing antioxidant power (FRAP) assays. Results: Conventional diet showed the highest content of polyunsaturated fatty acids while grazing showed the best n-6:n-3 and the linoleic:alpha linolenic acid ratio. Similarly, grazing and AF boosted the polyphenol content. Conclusions: Acacia farnesiana inclusion in the goats’ diets increased the presence of bioactive compounds and the antioxidant activity while diminishing the cholesterol content of goat’s milk.Keywords
This publication has 35 references indexed in Scilit:
- Factors affecting goat milk production and qualitySmall Ruminant Research, 2011
- Feeding goats on scrubby Mexican rangeland and pasteurization: influences on milk and artisan cheese qualityTropical Animal Health and Production, 2010
- The influence of plant polyphenols on lipolysis and biohydrogenation in dried forages at different phenological stages: in vitro studyJournal of the Science of Food and Agriculture, 2010
- Antioxidant activity, bioactive polyphenols in Mexican goats' milk cheeses on summer grazingJournal of Dairy Research, 2009
- Cheese quality from milk of grazing or indoor fed Zebu cows and Alpine crossbred goatsSmall Ruminant Research, 2007
- The Chemistry behind Antioxidant Capacity AssaysJournal of Agricultural and Food Chemistry, 2005
- Physical and Sensory Properties of Dairy Products from Cows with Various Milk Fatty Acid CompositionsJournal of Agricultural and Food Chemistry, 2004
- Inhibition of cholesterol biosynthesis by Δ22-unsaturated phytosterols via competitive inhibition of sterol Δ24-reductase in mammalian cellsBiochemical Journal, 2002
- Development and Validation of Oxygen Radical Absorbance Capacity Assay for Lipophilic Antioxidants Using Randomly Methylated β-Cyclodextrin as the Solubility EnhancerJournal of Agricultural and Food Chemistry, 2002
- Coronary heart disease: seven dietary factorsThe Lancet, 1991