Fat - Wikipedia
Stearic acid is a saturated fatty acid (with only single bonds) found in animal fats, and is the intended product in full hydrogenation. Oleic acid has a double bond (thus being "unsaturated") with cis geometry about midway in the chain; it makes up 55–80% of olive oil.. Elaidic acid is its trans isomer; it may be present in partially hydrogenated vegetable oils, and also occurs in the fat ...