Modification of Physicochemical Characteristics of Goat Milk Fat by Feeding Protected High Oleic Sunflower Oil Supplements

Protein-oil supplements containing high oleic sunflower oil (HOSO) and different proteins were prepared and fed to lactating goats. Milk fat from goats on basal diet had 12.5% oleic acid (C18:1n9), but C18:1n9 increased (P < 0.05) to 19.0% on the keratin protein-oil supplement diet, 19.2% on the casein protein-oil supplement diet, and 25.2% on dry casein (DC) protein-oil supplements diet. Feeding protein-oil supplements increased (P < 0.05) levels of triacylglycerols with 46 and 50 carbons in milk fat and decreased (P < 0.05) solid content in milk fat at 10°C from 34.8% to 23.0% for DC, to 26.5% for casein, and to 29.6% for keratin. The DC protein-oil supplement diet might produce spreadable butter out of the refrigerator.