Butterfat human

Ruminant depot and milk fats are characterized by their low level of unsaturation and by the presence of small amounts of trans acids resulting from rumen biohydrogenation (Section 10.1.3). The most common acid appears to be vaccenic (18 lilt) but other trans acids are also present. For example, butterfat contains ten octadecenoic acids (It through 16t) with the All isomer accounting for 72% of this group. Trans acids have been identified in human milk fat (2-4%), presumably arising from dietary trans acids (Section 3.4). 

Butyric (4 0) and caproic (6 0) adds occur only at the 5n-3-position. Other adds are also distributed preferentially, e.g. 18 0 at the 5n-l-position. This type of distribution is common to virtually all mammalian milk fats examined except the echidna (Parodi, 1982). The positional distribution of a number of mammalian milk fats (cow, goat, pig, sheep, rat and human) are compared in Table 3.156 (p. 116). The triglyceride carbon number distribution of 76 Australian butterfats (Table 3.157) has been studied (Guyot, 1977 Timms, 1980b), and the relationship below has been observed for triglycerides with carbon numbers 40, 42 and 44 where... 

Myristic acid occurs in butterfat and in coconut oil. Myristic acid is an example of a saturated fatty acid—its carbon chain has no double bonds. Other fatty acids—called monounsaturated or polyunsaturated fatty acids—have one or more double bonds, respectively, in their carbon chains. For example, oleic acid— found in olive oil, peanut oil, and human fat—is an example of a monounsaturated fatty acid. 

Human milk Animal fat butterfat butterfat soya ... 

---