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Animals (Basel). 2019 Aug 1;9(8). pii: E515. doi: 10.3390/ani9080515.

Goats' Feeding Supplementation with Acacia farnesiana Pods and Their Relationship with Milk Composition: Fatty Acids, Polyphenols, and Antioxidant Activity.

Author information

1
Departamento de Nutrición Animal, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), CDMX 14080, México. claudia.delgadillop@incmnsz.mx.
2
Departamento de Nutrición Animal, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (INCMNSZ), CDMX 14080, México.
3
Facultad de Química, Universidad Nacional Autónoma de México (UNAM), CDMX 4510, México.
4
Dipartimento per la Ricerca nelle Produzioni Animali, Agris, Località Bonassai, 07040 Olmedo Sassari, Italy.
5
Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), CDMX 04510, México.
6
Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), CDMX 04510, México.

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:

Acacia farnesiana pods; bioactive compounds; fatty acids; milk; radical scavenging

PMID:
31374913
DOI:
10.3390/ani9080515
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