Elaidic acid
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Elaidic acid
IUPAC name	(E)-octadec-9-enoic acid
Identifiers
CAS number
PubChem	637517
SMILES	CCCCCCCCC=CCCCCCCCC(=O)O
Properties
Molecular formula	C18H34O2
Molar mass	282.46136
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references

Elaidic acid is the major trans fat found in hydrogenated vegetable oils and occurs in small amounts in caprine and bovine milk (very roughly 0.1 % of the fatty acids)^[1]. It is the trans isomer of oleic acid.

Elaidic acid increases CETP activity, which in turn raises VLDL and lowers HDL cholesterol.^[2]

References

1. ^ Alonso L, Fontecha J, Lozada L, Fraga MJ, Juárez M (1999). "Fatty acid composition of caprine milk: major, branched-chain, and trans fatty acids". J. Dairy Sci. 82 (5): 878–84. PMID 10342226. 
2. ^ Abbey M, Nestel PJ (1994). "Plasma cholesteryl ester transfer protein activity is increased when trans-elaidic acid is substituted for cis-oleic acid in the diet". Atherosclerosis 106 (1): 99–107. PMID 8018112. 

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