Cows’ milk fat

Figure 13.15 The effect of diet on the Cl 8 1 trans fatty acids in the lipids of human milk (a) diet rich in cows milk fat, (b) diet rich in hydrogenated vegetable oil. (Courtesy of A. Stolyhwo.)...

It is known that the PCDD/Fs are very persistent in humans. Half-lives of most 2,3,7,8-substituted congeners have been measured in occupationally exposed cohorts and found to lie in the range of 5-15 years.80 This results in accumulation in humans, and the concentrations in human fat are at least an order of magnitude higher than in cows milk fat or beef fat.79 As in livestock, the... 

Parodi, P.W. 1997. Cows milk fat components as potential anticarcinogenic agents. J. Nutr. 127, 1055-1060. 

Rao, V.D., Murthy, M.K.R. 1987. Influence of the metal catalysts on the pattern of carbonyl production during the auto-oxidation of cow milk fat. Indian J. Anim. Sci. 57, 475-478. 

Collomb, M., Butikofer, U., Sieber, R., Jeangros, B., and Bosset, J.-O. 2002a. Composition of fatty acids in cows milk fat produced in the lowlands, mountains and highlands of Switzerland using high-resolution gas chromatography. Inti. Dairy J. 12, 649-659. 

Although nutrition specialists object to excessive consumption of animal fat, this component constitutes a considerable percentage in the global consumption balance. To improve its nutritional value, it is modified with respect to animal lipid composition and properties. The fat present in milk, eggs, and poultry meat is of particular interest. Nutritional modification of the amount and quality of cows milk fat plays an important role and can be effectively performed. However, fat modification by feeding is limited due to the biohydrogenation in rumen, resulting in a lower supply of unsaturated FA from feed. 

Notice from the table that human and cow milk fats have a relatively high content of shorter-chain (C10-C14) fatty acids. If you were to make a milk supplement using a plant source of oil, which might you use ... 

Hilditch, T.P. and P.N. Williams. Cow Milk Fats, in The Chemical Constitution of Natural... 

Monounsaturated fatty acids 9-Dodecenoic 12 1 n-3 Lauroleic CH3-CH2-CH=(CH2)t-COOH Cow milk fats... 

Effects of Ruminal or Postruminal Fish Oil Supply on Conjugated Linoleic Acid (CLA) Content of Cow Milk Fat, Proc. Nutr. Soc. 58,70A. 

Table 3.45 Relative representation of frans-octadecenoic fatty acids in margarine blends containing partially hydrogenated fats in comparison with cows milk fat (% of total trans-octadecenoic acids indicated are ranges of values and median values).

Double bond position Partially hydrogenated vegetable oil Cows milk fat... 

HCOr-C Dairy cow Milk fat 2% of earbon in fat originates from IICOj (226) ... 

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