Plasma fatty acid profile in Italian Holstein-Friesian dairy cows supplemented with natural polyphenols from the olive plant Olea Europaea L

• Published in: Veterinary and animal science 2023-09, Vol.21, p.100298-100298, Article 100298
• Main Authors: Di Meo, Maria Chiara, Salzano, Angela, Zotti, Tiziana, Palladino, Antonio, Giaquinto, Daniela, Maruccio, Lucianna, Romanucci, Riccardo, Rocco, Mariapina, Zarrelli, Armando, D'Occhio, Michael J., Campanile, Giuseppe, Varricchio, Ettore
• Format: Article
• Language: English
• Subjects: Antioxidant activity; Dairy cows; Fatty acids; Functional feed; Holstein; Olea Europaea L. polyphenols
• ISSN: 2451-943X; 2451-943X
• DOI: 10.1016/j.vas.2023.100298

•Functional feed with olive extract improves plasma fatty acid profile in dairy cows.•Phenolic compounds in PhenoFeed Dry are hydroxytyrosol, tyrosol and verbascoside.•High total polyphenols content and antioxidant activity in the functional feed.•Close relationship between the diet fatty acid composition and plasma lipid content.•PUFA are the fatty acids most influenced by the phenolic composition of cows’ diet. This study evaluated the effects of supplementing with natural functional feed on the plasma fatty acid profile of lactating Italian Holstein-Friesian dairy cows. Thirty cows in mid-lactation received the natural olive extract PHENOFEED DRY (500 mg/cow/day) which mainly comprises hydroxytyrosol, tyrosol and verbascoside. The total content of polyphenols and the antioxidant power of standard feed, enriched feed and pure extract was evaluated respectively by Folin-Ciocalteu and DPPH assay, and a characterization in HPLC-UV (High-Performance Liquid Chromatography-Ultraviolet) of bioactive molecules present in the extract PHENOFEED DRY was performed. PHENOFEED DRY was provided for 60 days, and the plasma profile of fatty acids was determined by Gas Chromatography. The administration of enriched feed resulted in an increase in the ratio of Omega-6 to Omega-3 polyunsaturated fatty acids from 3:1 to 4:1 (p