The Comparative Rate of Absorption of Some Natural Fats

Deuel, Harry J.; Hallman, Lois F.; Leonard, A.Byron

doi:10.1093/jn/20.3.215

Cited by 53 publications

(12 citation statements)

References 20 publications

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“…The changes in milk fat in eicosenoic acid and, more especially, erucic acid relative to the changes in the plasma triglycerides are proportionately much less than for other acids. There is evidence in the cow of a barrier to their uptake by the mam-mary gland (Beitz & Davis, 1964; Storry, Hall, Tuckley & Millard, 1969) and erucic acid has been shown to be poorly absorbed from the intestine (Deuel, Hallman & Leonard, 1940; Thomasson, 1956).…”

Section: Discussionmentioning

confidence: 99%

The effects of intravenous infusions of triglycerides on the composition of milk fat in the sow

et al. 1970

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I .Emulsions with egg phosphatides of nine synthetic triglycerides (tributyrin, tricaprylin, tripelargonin, tricaprin, trilaurin, trimyristin, tripahitin, triisostearin, triolein) and of rapeseed oil and a proprietary emulsion of cottonseed oil were given as continuous infusions into the jugular vein of lactating sows. The effects of the infusions on the concentration and composition of blood plasma lipids and on the composition of milk fat were determined.2. The infusions did not affect the concentrations in blood plasma of cholesterol, phospholipid or cholesterol esters, but there was a tendency for the concentration of plasma triglycerides to be increased which was most pronounced for the infusions of longer-chain triglycerides. The fatty acid composition of the plasma triglycerides was not altered by the infusion of tributyrin, except that there was an increase in the content of oleic and a decrease in that of linoleic acid. With other infusions the composition of the plasma triglycerides was altered towards that of the infused material and the effect was more marked for the longer-chain triglycerides, with the exception of triisostearin.3. The changes in the composition of the milk fat reflected those in the composition of plasma triglycerides, with two exceptions. The infusion of tripalmitin was associated with an increase not only in the palmitic acid content of milk fat but also in the palmitoleic acid content. Also, the changes in the content in milk fat of eicosenoic acid and, more especially of erucic acid during the infusion of rapeseed oil were much less than the corresponding changes in the plasma triglycerides.Studies of arteriovenous differences across the mammary glands of lactating sows (Linzell, Mepham, Annison & West, 1969; Spincer, Rook & Towers, 1969) have demonstrated an uptake of triglyceride fatty acids, which are incorporated largely into the triglycerides of milk fat (J. Spincer & J. A. F. Rook, unpublished). The fatty acids principally involved are palmitic, stearic and oleic, the major fatty acids of the plasma triglycerides. The present experiments were undertaken to study the extent to which these and other fatty acids are transferred to milk fat when infused as triglycerides into the blood plasma.Pharmacological and toxicological side-effects have been reported in a number of animal species following the infusion of vegetable oils in combination with a range of emulsifiers, but Schuberth & Wretlind (1961) found emulsions of soya-bean oil with egg phosphatides to be free of such effects. Emulsions with egg phosphatides of tripropionin, tricaproin, tricaprylin, tripelargonin, tricaprin, trilaurin and triolein (Storry, Tuckley & Hall, 1969) Animals and their management. Lactating Wessex/Landrace/Large White sows with piglets were taken as required from the University herd. Sows were confined in a holding crate and piglets to a separate pen. Suckling was permitted at 1.5 h intervals. Meal (5.5 kg/head per day) was offered to the sows twice daily and there was free access to water. ...

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Section: Discussionmentioning

confidence: 99%

The effects of intravenous infusions of triglycerides on the composition of milk fat in the sow

et al. 1970

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“…Three hours after the adm inistration of the fat the animals of both groups were killed by decapitation and the gastrointestinal tract (GIT) was taken out. The extent of resorption was ascertained by determ ining the quantity of the unresorbed fat remaining in the G IT ; this determ ination was carried out essentially according to Deuel (1) with the difference, however, th at the different parts of the G IT (oesophagus -f-stomach, small intestine and large intestine) were subjected to a separate treatm ent. Monoglyccrides have been deter mined in the unresorbed fat (6, 7); free fatty acids were determ ined by titration.…”

Section: Methodsmentioning

confidence: 99%

The Effect of Thermal Adjustment of Sunflower-Oil on its Resorption in Rats

Bobek¹,

Ginter²

1963

Ann Nutr Metab

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“…Published values for the rates of fat absorption obtained under these conditions (1)(2)(3)(4)(5)(6)(7) are only high enough to account for about half the energy required for rapid growth. However, it is known (8, 9) that diets providing far more than 50% of calories as fat can support rapid growth in the rat.…”

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confidence: 99%

“…Laboratory rats which have not been exposed to high-fat diets have usually been used to measure the rates at which test meals of fat (triglyceride) can be digested and absorbed (1)(2)(3)(4)(5)(6)(7). Published values for the rates of fat absorption obtained under these conditions (1)(2)(3)(4)(5)(6)(7) are only high enough to account for about half the energy required for rapid growth.…”

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confidence: 99%

“…Nonlipid components of the highfat diet appear to have contributed to the relatively rapid absorption of its fat content. The protein and perhaps also other ingredients brought about an increased fat consumption, an effect known to enhance fat absorption (1,2 ) , and may have facilitated micelle formation in the small intestine. The massive intake of the high-fat diet by starved animals appears to have been responsible for the particularly high rate of fat absorption observed in these animals.…”

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confidence: 99%

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