Branched chain fatty acids (BCFA) are primarily saturated fatty acids (FA) with one or more methyl branch on the carbon chain. BCFA are categorized as mono-, di-, or multi-methyl BCFA based on the number of methyl branches. BCFAs can be found in bacteria, fish, dietary products and in the vernix caseosa of human infants. Human breast milk and fermented soy have relatively high amounts of BCFAs in natural occurring food resources.