Fatty acids in bovine milk fat

Area of Science:

• Dairy Science
• Nutritional Biochemistry
• Food Chemistry

Background:

• Milk fat is a complex lipid mixture, comprising approximately 400 different fatty acids.
• These fatty acids originate from both the cow's diet and microbial synthesis within the rumen.
• Lipids in bovine milk are primarily structured as an oil-in-water emulsion within globules.

Purpose of the Study:

• To characterize the fatty acid composition of Swedish milk fat.
• To quantify the proportions of saturated, monounsaturated, polyunsaturated, and trans fatty acids.
• To analyze the presence and proportion of short-chain fatty acids, including butyric acid.

Main Methods:

• Fatty acid profiling of milk fat samples.
• Quantification of saturated, monounsaturated, and polyunsaturated fatty acids.
• Analysis of short-chain and trans fatty acid content.

Main Results:

• Approximately 70% of the fatty acids in Swedish milk fat are saturated.
• Short-chain fatty acids constitute about 11% of the total fatty acids, with butyric acid being a major component.
• Monounsaturated fatty acids account for roughly 25%, polyunsaturated fatty acids for 2.3%, and trans fatty acids for 2.7%.

Conclusions:

• Swedish milk fat exhibits a high proportion of saturated fatty acids.
• The composition includes significant levels of short-chain fatty acids, notably butyric acid.
• The study provides detailed insights into the complex fatty acid profile of milk fat.