Butterfat

Fatty assign of milk
Butterfat or milkfat is the fatty parcel of milk. milk and cream are much sold according to the total of butterfat they contain .

composition [edit ]

structure of a triglyceride containing myristic, palmitic, and oleic acerb. Butterfat is chiefly composed of triglycerides. Each triglyceride contains three fatso acids. Butterfat triglycerides contain the watch amounts of fatty acids ( by mass fraction ) : [ 1 ] [ 2 ] [ 3 ]

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Fatty acid content of butterfat

Type of fatty acid

pct

Lower saturated (at most C12)

11%

Myristic saturated C14

12%

Palmitic saturated C16

31%

Stearic saturated C18

11%

Palmitoleic monounsaturated C16:1

4%

Oleic monounsaturated C18:1

24%

Linoleic polyunsaturated C18:2

3%

Alpha-Linolenic polyunsaturated C18:3

1%

Trans (mainly vaccenic C18:1 trans-11)

3%

black: Saturated; grey: Monounsaturated; green: Polyunsaturated; blue: Trans

Butterfat contains about 3 % trans fat, which is slenderly less than 0.5 grams per US tablespoon. [ 3 ] Trans fats occur naturally in kernel and milk from ruminants. The prevailing kind of trans fat found in milk is vaccenic fatty acidic. Trans fats may be besides found in some industrially produced foods, such as shortenings obtained by hydrogenation of vegetable oils. In alight of recognized scientific evidence, nutritional authorities consider all trans fats evenly harmful for health and recommend that their consumption be reduced to trace amounts. [ 4 ] [ 5 ] [ 6 ] [ 7 ] [ 8 ] however, two canadian studies have shown that vaccenic acidic could be beneficial compared to vegetable shortenings containing trans fats, or a mixture of pork barrel lard and soy fat, by lowering full LDL and triglyceride levels. [ 9 ] [ 10 ] [ 11 ] [ 12 ] [ 13 ] A report by the US Department of Agriculture showed that vaccenic acidic raises both HDL and LDL cholesterol, whereas industrial trans fats entirely raise LDL with no beneficial effect on HDL. [ 14 ]

Milk fatty acids, length, and position on glycerol (1, 2, 3) [15]

Fatty acid
length
mol% (rounded)
1
2
3

Butyryl
C4
12
0
0
100

Caproyl
C6
5
0
7
93

Caprylyl
C8
2
25
12
63

Capryl
C10
4
17
27
56

Lauryl
C12
4
42
53
5

Myristyl
C14
11
29
52
19

Palmityl
C16
24
47
45
8

Hexadecenoyl
C16:1
3
36
46
18

Stearyl
C18
7
49
45
6

Oleyl
C18:1
24
42
26
32

Linoleyl
C18:2
3
23
47
31

U.S. standards [edit ]

In the U.S., there are federal standards [ 16 ] for butterfat message of dairy products. [ 17 ] [ 18 ] [ 19 ] [ 20 ] Many other countries besides have standards for minimal fatness levels in dairy products. commercial products generally contain the minimum legal sum of fat with any excess being removed to make cream, a valuable commodity .

See besides [edit ]

References [edit ]