Branched chain fatty acids (BCFA) are usually saturated fatty acids with one or more methyl branches on the carbon chain. BCFAs are most often found in bacteria., but can be found in the vernix caseosa of human infants where they may play a role in fostering the development of the human intestinal microbiota. Another waxy animal material containing BCFAs is lanolin. Branched chain fatty acids (BCFA) are usually saturated fatty acids with one or more methyl branches on the carbon chain. BCFAs are most often found in bacteria., but can be found in the vernix caseosa of human infants where they may play a role in fostering the development of the human intestinal microbiota. Another waxy animal material containing BCFAs is lanolin.