Rumenic acid, also known as bovinic acid, is a conjugated linoleic acid (CLA) found in the fat of ruminants and in dairy products.

[1] It can be considered as the principal dietary form, accounting for as much as 85-90% of the total CLA content in dairy products.

[2] Rumenic acid is produced from vaccenic acid by the action of unsaturase enzymes.

[3] Rumenic acid is converted back to vaccenic acid en route to stearic acid F. Destaillats; E. Buyukpamukcu; P.-A.

"Letter to the Editor: Vaccenic and Rumenic Acids, A Distinct Feature of Ruminant Fats".