Polar lipid composition of bioactive dairy co-products buttermilk and butterserum: Emphasis on sphingolipid and ceramide isoforms

摘要: Bioactive lipids of the milk fat globule membrane become concentrated in two co-products butter industry, buttermilk and butterserum. Their lipid composition is detailed here with special emphasis on sphingolipid nutritional interest, determined using GC, HPLC tandem mass spectrometry. Butterserum was 2.5 times more total than buttermilk, 7.7±1.5vs 19.5±2.9wt% even polar lipids, 1.4±0.2vs 8.5±1.1wt%. Both ingredients constitute sources sphingomyelin (3.4-21mg/g dry matter) contained low amounts bioactive ceramides a ratio to 1:5mol% 1:10mol% Compared other natural lecithins, these are rich long saturated fatty acids (C22:0-C24:0), contain cholesterol could have interesting applications neonatal nutrition, but also as brain-protective, hepatoprotective lowering ingredients.