**4.4 Anticancer action**

Some authors studied the antiproliferative effect of several isolated fractions of buttermilk obtained from food and nonfood solvents on some types of human cancer cells. Fractions, rich in phospho- and sphingolipids, have strong antiproliferative action on colon and ovary cancer cells. These observations allow to hypothesize the use of these phospho- and sphingolipids as functional food additives [27].
