Effects of calcium salts differing in fatty acid composition on duodenal and milk fatty acid profiles in dairy cows

Ferlay, Anne; Chilliard, Yves; Doreau, M.

doi:10.1002/jsfa.2740600107

Cited by 38 publications

(17 citation statements)

References 18 publications

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“…2.13 in control diet (OCS). These results are in agrement with Ferlay et al (1992), who reported that CS of rape seed oil increased the concentration of propionate in the rumen. No differences in ruminal fermentation between controls and cows fed calcium soaps were observed by Elmeddah and Doreau (1992) and Drackley and Elliot (1993).…”

Section: Resultssupporting

confidence: 87%

Effect of Calcium Soaps on Rumen Fermentation, Protein Degradability of Barley, Rapeseed Meal and Soybean Meal

Nowak¹,

Potkański²

2002

Journal of Applied Animal Research

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Section: Resultssupporting

confidence: 87%

Effect of Calcium Soaps on Rumen Fermentation, Protein Degradability of Barley, Rapeseed Meal and Soybean Meal

Nowak¹,

Potkański²

2002

Journal of Applied Animal Research

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“…The limitations of such a dietary practice are linked to the processing costs and to the controversial use of formaldehyde. Other so-called lipid protection techniques, such as FA salts, do not prevent PUFA hydrogenation or the negative effect of rapeseed oil on milk fat content ( [143] and review [19]) because the salts are dissociated in the rumen as the pH decreases. Lastly, it is worth remembering that increasing the 18:2n-6 proportion in dairy products is not a target in itself, insofar as improving the nutritional value of these products preferably requires increasing the 18:3n-3/ 18:2n-6 ratio.…”

Section: Linoleic Acid (N-6 Series)mentioning

confidence: 99%

Diet, rumen biohydrogenation and nutritional quality of cow and goat milk fat

Chilliard

Glasser

Ferlay

et al. 2007

Euro J Lipid Sci & Tech

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743

102

786

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Diet, rumen biohydrogenation and nutritional quality of cow and goat milk fatThe potential to modify the milk fatty acid (FA) composition by changing the cow or goat diets is reviewed. Ruminal biohydrogenation (RBH), combined with mammary lipogenic and D-9 desaturation pathways, considerably modifies the profile of dietary FA and thus milk composition. The pasture has major effects by decreasing saturated FA and increasing FA considered as favorable for human health (c9-18:1, 18:3n-3 and c9t11-CLA), compared to winter diets, especially those based on maize silage and concentrates. Plant lipid supplements have effects similar to pasture, especially linseed, but they increase to a larger extent, simultaneously several trans isomers of 18:1 and, conjugated or non-conjugated 18:2, especially when added to maize silage or concentrate-rich diets. The goat responds better for milk 18:3n-3 and c9t11-CLA, and sometimes less for c9-18:1, and is less prone to the RBH trans-11 to trans-10 shift, which has been shown to be time dependent in the cow. The respective physiological roles of most milk trans FA have not been studied to date, and more studies in rodents and humans fed dairy products modified by changing ruminant diet are required before recommending a larger use of lipid sources and how to combine them with the different feeding systems used by dairy farmers.Keywords: Diet composition, biohydrogenation intermediates, mammary metabolism, fatty acid desaturation, milk fatty acids. 828 DOI 10.1002/ejlt.200700080 Eur. J. Lipid Sci. Technol. 109 (2007 IntroductionMilk fat secretion and milk fatty acid (FA) composition are of great interest with regard to human nutrition. Apart from their contribution to dairy products' sensorial quality and to the amount of dietary energy, different lipid and FA compounds (short-and medium-chain saturated, branched, mono-and polyunsaturated, cis and trans, conjugated FA, etc.) present in ruminant milk fat are indeed potentially positive or negative factors for the health of consumers [1][2][3].Dairy products provide indeed 25-60% of the overall saturated fat consumption in Europe, which makes them, since decades, a target of dieticians' criticism due to the negative effects of excessive consumption of saturated FA on human health [4]. The image of saturated FA should, however, be weighed by the fact that C 12 -C 16 saturated FA are thought to be atherogenic only when consumed in excessive amounts, that 18:0 has no atherogenic effect and that saturated fat could even be protective when compared to a low-fat, high-carbohydrate diet [5,6]. The allegedly atherogenic effect of certain trans monounsaturated FA (MUFA) [7] has not been confirmed for vaccenic acid (t11-18:1), the main isomer present in milk [8,9]. The intake of some trans isomers of 18:2 seems to be particularly harmful, although further research is needed to discriminate between industrial and ruminant isomer profiles [10]. In other respects, it has been shown in humans that the consumption of milk fat [11] could sometimes d...

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“…Among the non-forage feedstuffs, linseed is the only one which has significant linoleic acid [38,56,59,97], because the salts dissociate in the rumen when pH falls. This is then followed by an extensive ruminal hydrogenation.…”

Section: Increasing Polyunsaturated Fatty Acidsmentioning

confidence: 99%

Ruminant milk fat plasticity: nutritional control of saturated, polyunsaturated, trans and conjugated fatty acids

et al. 2000

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-After a brief survey of metabolic pathways and nutrient fluxes involved in mammary lipogenesis, this review summarises the known effects of diet on ruminant milk fat composition. Special attention is given to fatty acids that could play a positive role for human health, such as butyric acid, oleic acid, C18 to C22 polyunsaturated fatty acids and conjugated linoleic acid (CLA). The efficiency of the transfer of C18:2, C18:3, C20:5, C22:5 and C22:6, from the duodenum to the milk, is reviewed. The main dietary factors taken into account are the nature of forages, including pasture, and the supplementation of dairy rations with protected or unprotected vegetable or fish oils. Dose-response curves of milk CLA are reviewed for different fat supplements, as well as the non-linear relationship between milk CLA and trans C18:1. The potential of dietary factors to increase the mean CLA content in cow milk fat is about 300% above basal values. There is, however, a need to evaluate how the different feeding strategies could change the other aspects of milk fat quality. ruminant / nutrition / milk / fatty acids / human healthRésumé -Plasticité de la matière grasse du lait de ruminant : contrôle nutritionnel des acides gras saturés, polyinsaturés, trans et conjugués. Après un bref rappel des voies métaboliques et des flux de nutriments qui concourrent à la lipogenèse mammaire, cette revue est consacrée aux principaux effets des facteurs alimentaires sur la composition des lipides du lait de ruminant. Un intérêt particulier est porté aux acides gras qui peuvent avoir des effets positifs sur la santé humaine, tels que les acides butyrique, oléique, linoléique conjugué (CLA) et les acides gras polyinsaturés, de 18 à 22 atomes de carbone. L'efficacité du transfert des C18:2, C18:3, C20:5, C22:5 et C22:6, du duodénum au lait est estimée à partir des données de la bibliographie. Les principaux facteurs alimentaires considérés sont la nature des fourrages, dont l'herbe pâturée, et la supplémentation des rations pour vaches laitières avec des huiles végétales ou de poisson, protégées ou non. L'augmentation potentielle

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Effects of calcium salts differing in fatty acid composition on duodenal and milk fatty acid profiles in dairy cows

Cited by 38 publications

References 18 publications

Effect of Calcium Soaps on Rumen Fermentation, Protein Degradability of Barley, Rapeseed Meal and Soybean Meal

Effect of Calcium Soaps on Rumen Fermentation, Protein Degradability of Barley, Rapeseed Meal and Soybean Meal

Diet, rumen biohydrogenation and nutritional quality of cow and goat milk fat

Ruminant milk fat plasticity: nutritional control of saturated, polyunsaturated, trans and conjugated fatty acids

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