Abstract

The use of lipids in the diet of dairy cows is widely spread in animal production, since these have great ability to assist in recovery from stress caused by postpartum, where animals are in poor body condition, from low consumption of dry matter in the state of negative energy balance. Ruminants receive the lipids, mainly in esterified form (mono-and diglycerides) in the fodder and focused in the form of triglycerides. After the intake of lipids, these chemical changes occur in the ruminal environment, changing the composition and profile of fatty acids. Flaxseed is very rich in linoleic acid (C18:2), which is an important fatty acid secreted by the mammary gland and in humans is associated with the fight against free radicals. Such characteristics are studied by agricultural sciences professionals to optimize the diet of dairy cows, with the aim of increasing conjugated linoleic acid content (CLA) in milk. The objective of this review was to facilitate the understanding on the issues of metabolism, milk composition and performance of dairy cows placed in front of the supplementation

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