The digestion profiles of lipids with different unsaturated levels under the treatment of different intestinal bacteria

Multiple lines of evidences have been demonstrated intestine microbiota could impact the digestion profiles of lipids. In the present study, the effects of different levels of unsaturation in lipids on their digestion patterns under specific gut microbial communities were examined. The results indicated that the different intestinal bacteria does not affect the final free fatty acid content. The most obvious change was found in rapeseed oil with Escherichia fergusonii, and the lowest change was found in linseed oil groups with Escherichia coli (ATCC 25922). Relatively, the digestive rate of palm oil was affected by the bacteria more easily, when compared with other lipids. The higher the unsaturated level of lipids, the less affected by bacteria during the digestion process. Meanwhile, the relative contents of glycerides among groups revealed obvious differences, which reflected that lipid digestion was severely influenced by different bacteria. The changes in lipid digestion profiles might be attributed to some secondary bile acids, amino acids and their derivatives, and organic acids.