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Acta Portuguesa de Nutrição
On-line version ISSN 2183-5985
Abstract
BASTO, Bruna I and TEIXEIRA, José A. EFFECT OF PASTURE VERSUS CONVENTIONAL FEEDING SYSTEMS ON THE COMPOSITION OF MILK PRODUCED IN PORTUGAL. Acta Port Nutr [online]. 2020, n.23, pp.36-39. Epub May 18, 2021. ISSN 2183-5985. https://doi.org/10.21011/apn.2020.2307.
INTRODUCTION:
Cows’ milk is widely consumed and is considered essential for the diet of billions of people worldwide. Conjugated linoleic acid and omega-6/omega-3 (ω6/ω3) ratio have been associated with the improvement of human health. The feed factors of cows are highly related with the lipidic composition of milk.
OBJECTIVES:
Compare the effect of the two different feeding systems (pasture and conventional) in conjugated linoleic acid concentration and in ω6/ω3 ratio in milk produced in Portugal.
METHODOLOGY:
The study includes the data analysis of the provided reports, containing the results of the 12 samples (2018-2020) from 3 different brands (Portugal), and their graphical comparison.
RESULTS:
The concentration of conjugated linoleic acid is always higher (around 10 mg/100g of conjugated linoleic acid) in milk A (pasture milk) and presents a more constant profile throughout the sampling period. Also, the ω6/ω3 ratio of pasture milk presents a more constant profile and the ratio values are the closest to the recommended.
CONCLUSIONS:
The pasture-feeding system produces milk more nutritionally enriched, with a composition more constant through the different seasons of the year and ensuring the welfare of cows. The milk produced by those systems appears to have an improved fatty acids profiling.
Keywords : Conjugated linoleic acid; Omega-6/omega-3 ratio; Pasture milk; Pasture-feeding system.