In the same way buttermilk produced from milk which has been previously ripened by matzoon is used as a beverage.
Malted milk, kumyss, or matzoon may be given in place of milk.
matzoon and other similar preparations are essentially soured milks, prepared under controlled conditions.
In regard to the biology of matzoon, the occurrence of various organisms has been recorded.
Later kumyss or matzoon can be tried, and finally thin gruels made with milk.