Pentadecanoic acid is a saturated fatty acid. Its molecular formula is CH3(CH2)13COOH. It is rare in nature, being found at the level of 1.2% in the milk fat from cows. The butterfat in cows milk is its major dietary source and it is used as a marker for butterfat consumption. Pentadecanoic acid also occurs in hydrogenated mutton fat.
Pentadecanoic acid may increase mother-to-child transmission of HIV through breastfeeding.
^Smedman, AE; Gustafsson, IB; Berglund, LG; Vessby, BO (1999). "Pentadecanoic acid in serum as a marker for intake of milk fat: relations between intake of milk fat and metabolic risk factors". The American journal of clinical nutrition69 (1): 22–9. PMID9925119.
^Villamor, E; Koulinska, IN; Furtado, J; Baylin, A; Aboud, S; Manji, K; Campos, H; Fawzi, WW (2007). "Long-chain n-6 polyunsaturated fatty acids in breast milk decrease the risk of HIV transmission through breastfeeding". The American journal of clinical nutrition86 (3): 682–9. PMID17823433.