S udies on Human Milk (Part 2)

The chemical composition, several characteristics of fat, and fatty acid composition of composite summer and winter milks of various lactation period from mothers in Sapporo were investigated.A little difference in the main components was seen between winter and summer milks, but the average values fell within the range in the foregoing literatures.Iodine value of fat was considerably higher than that of foreign woman milk.Saturated capric, lauric and myristic acid contents were higher, and stearic acid was less, unsaturated linoleic and linolenic acids were more but oleic acid was less compared with those in the milk from foreign women.Although there were certain differences in several characteristics of fat and fatty acid composition between winter and summer milks, they were less remarkable than those seen in the foreign literatures.